Junction between the cerebellum and the pons.
Primary or metastatic neoplasms of the CEREBELLUM. Tumors in this location frequently present with ATAXIA or signs of INTRACRANIAL HYPERTENSION due to obstruction of the fourth ventricle. Common primary cerebellar tumors include fibrillary ASTROCYTOMA and cerebellar HEMANGIOBLASTOMA. The cerebellum is a relatively common site for tumor metastases from the lung, breast, and other distant organs. (From Okazaki & Scheithauer, Atlas of Neuropathology, 1988, p86 and p141)
A benign SCHWANNOMA of the eighth cranial nerve (VESTIBULOCOCHLEAR NERVE), mostly arising from the vestibular branch (VESTIBULAR NERVE) during the fifth or sixth decade of life. Clinical manifestations include HEARING LOSS; HEADACHE; VERTIGO; TINNITUS; and FACIAL PAIN. Bilateral acoustic neuromas are associated with NEUROFIBROMATOSIS 2. (From Adams et al., Principles of Neurology, 6th ed, p673)
Diseases of the facial nerve or nuclei. Pontine disorders may affect the facial nuclei or nerve fascicle. The nerve may be involved intracranially, along its course through the petrous portion of the temporal bone, or along its extracranial course. Clinical manifestations include facial muscle weakness, loss of taste from the anterior tongue, hyperacusis, and decreased lacrimation.
Intradermal or subcutaneous saclike structure, the wall of which is stratified epithelium containing keratohyalin granules.
Benign and malignant neoplasms that arise from one or more of the twelve cranial nerves.
A relatively common neoplasm of the CENTRAL NERVOUS SYSTEM that arises from arachnoidal cells. The majority are well differentiated vascular tumors which grow slowly and have a low potential to be invasive, although malignant subtypes occur. Meningiomas have a predilection to arise from the parasagittal region, cerebral convexity, sphenoidal ridge, olfactory groove, and SPINAL CANAL. (From DeVita et al., Cancer: Principles and Practice of Oncology, 5th ed, pp2056-7)
A syndrome characterized by recurrent episodes of excruciating pain lasting several seconds or longer in the sensory distribution of the TRIGEMINAL NERVE. Pain may be initiated by stimulation of trigger points on the face, lips, or gums or by movement of facial muscles or chewing. Associated conditions include MULTIPLE SCLEROSIS, vascular anomalies, ANEURYSMS, and neoplasms. (Adams et al., Principles of Neurology, 6th ed, p187)
Tumors or cancer of any part of the hearing and equilibrium system of the body (the EXTERNAL EAR, the MIDDLE EAR, and the INNER EAR).
Pathological processes of the VESTIBULOCOCHLEAR NERVE, including the branches of COCHLEAR NERVE and VESTIBULAR NERVE. Common examples are VESTIBULAR NEURITIS, cochlear neuritis, and ACOUSTIC NEUROMA. Clinical signs are varying degree of HEARING LOSS; VERTIGO; and TINNITUS.
Recurrent clonic contraction of facial muscles, restricted to one side. It may occur as a manifestation of compressive lesions involving the seventh cranial nerve (FACIAL NERVE DISEASES), during recovery from BELL PALSY, or in association with other disorders. (From Adams et al., Principles of Neurology, 6th ed, p1378)
The dense rock-like part of temporal bone that contains the INNER EAR. Petrous bone is located at the base of the skull. Sometimes it is combined with the MASTOID PROCESS and called petromastoid part of temporal bone.
Diseases that affect the structure or function of the cerebellum. Cardinal manifestations of cerebellar dysfunction include dysmetria, GAIT ATAXIA, and MUSCLE HYPOTONIA.
Benign and malignant neoplastic processes that arise from or secondarily involve the meningeal coverings of the brain and spinal cord.
Benign or malignant tumors which arise from the choroid plexus of the ventricles of the brain. Papillomas (see PAPILLOMA, CHOROID PLEXUS) and carcinomas are the most common histologic subtypes, and tend to seed throughout the ventricular and subarachnoid spaces. Clinical features include headaches, ataxia and alterations of consciousness, primarily resulting from associated HYDROCEPHALUS. (From Devita et al., Cancer: Principles and Practice of Oncology, 5th ed, p2072; J Neurosurg 1998 Mar;88(3):521-8)
A neoplasm that arises from SCHWANN CELLS of the cranial, peripheral, and autonomic nerves. Clinically, these tumors may present as a cranial neuropathy, abdominal or soft tissue mass, intracranial lesion, or with spinal cord compression. Histologically, these tumors are encapsulated, highly vascular, and composed of a homogenous pattern of biphasic fusiform-shaped cells that may have a palisaded appearance. (From DeVita Jr et al., Cancer: Principles and Practice of Oncology, 5th ed, pp964-5)
An examination, review and verification of all financial accounts.
The 8th cranial nerve. The vestibulocochlear nerve has a cochlear part (COCHLEAR NERVE) which is concerned with hearing and a vestibular part (VESTIBULAR NERVE) which mediates the sense of balance and head position. The fibers of the cochlear nerve originate from neurons of the SPIRAL GANGLION and project to the cochlear nuclei (COCHLEAR NUCLEUS). The fibers of the vestibular nerve arise from neurons of Scarpa's ganglion and project to the VESTIBULAR NUCLEI.
The infratentorial compartment that contains the CEREBELLUM and BRAIN STEM. It is formed by the posterior third of the superior surface of the body of the sphenoid (SPHENOID BONE), by the occipital, the petrous, and mastoid portions of the TEMPORAL BONE, and the posterior inferior angle of the PARIETAL BONE.
A fine channel that passes through the TEMPORAL BONE near the SCALA TYMPANI (the basilar turn of the cochlea). The cochlear aqueduct connects the PERILYMPH-filled bony labyrinth to the SUBARACHNOID SPACE.
A nonspecific symptom of hearing disorder characterized by the sensation of buzzing, ringing, clicking, pulsations, and other noises in the ear. Objective tinnitus refers to noises generated from within the ear or adjacent structures that can be heard by other individuals. The term subjective tinnitus is used when the sound is audible only to the affected individual. Tinnitus may occur as a manifestation of COCHLEAR DISEASES; VESTIBULOCOCHLEAR NERVE DISEASES; INTRACRANIAL HYPERTENSION; CRANIOCEREBRAL TRAUMA; and other conditions.
Muscles of facial expression or mimetic muscles that include the numerous muscles supplied by the facial nerve that are attached to and move the skin of the face. (From Stedman, 25th ed)
An involuntary contraction of a muscle or group of muscles. Spasms may involve SKELETAL MUSCLE or SMOOTH MUSCLE.
Rare indolent tumors comprised of neoplastic glial and neuronal cells which occur primarily in children and young adults. Benign lesions tend to be associated with long survival unless the tumor degenerates into a histologically malignant form. They tend to occur in the optic nerve and white matter of the brain and spinal cord.
The 7th cranial nerve. The facial nerve has two parts, the larger motor root which may be called the facial nerve proper, and the smaller intermediate or sensory root. Together they provide efferent innervation to the muscles of facial expression and to the lacrimal and SALIVARY GLANDS, and convey afferent information for TASTE from the anterior two-thirds of the TONGUE and for TOUCH from the EXTERNAL EAR.
Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.
The blind pouch at the end of the endolymphatic duct. It is a storage reservoir for excess ENDOLYMPH, formed by the blood vessels in the membranous labyrinth.
The 5th and largest cranial nerve. The trigeminal nerve is a mixed motor and sensory nerve. The larger sensory part forms the ophthalmic, mandibular, and maxillary nerves which carry afferents sensitive to external or internal stimuli from the skin, muscles, and joints of the face and mouth and from the teeth. Most of these fibers originate from cells of the TRIGEMINAL GANGLION and project to the TRIGEMINAL NUCLEUS of the brain stem. The smaller motor part arises from the brain stem trigeminal motor nucleus and innervates the muscles of mastication.
Mechanical compression of nerves or nerve roots from internal or external causes. These may result in a conduction block to nerve impulses (due to MYELIN SHEATH dysfunction) or axonal loss. The nerve and nerve sheath injuries may be caused by ISCHEMIA; INFLAMMATION; or a direct mechanical effect.
A usually benign neoplasm that arises from the cuboidal epithelium of the choroid plexus and takes the form of an enlarged CHOROID PLEXUS, which may be associated with oversecretion of CSF. The tumor usually presents in the first decade of life with signs of increased intracranial pressure including HEADACHES; ATAXIA; DIPLOPIA; and alterations of mental status. In children it is most common in the lateral ventricles and in adults it tends to arise in the fourth ventricle. Malignant transformation to choroid plexus carcinomas may rarely occur. (Adams et al., Principles of Neurology, 6th ed, p667; DeVita et al., Cancer: Principles and Practice of Oncology, 5th ed, p2072)
Severe or complete loss of facial muscle motor function. This condition may result from central or peripheral lesions. Damage to CNS motor pathways from the cerebral cortex to the facial nuclei in the pons leads to facial weakness that generally spares the forehead muscles. FACIAL NERVE DISEASES generally results in generalized hemifacial weakness. NEUROMUSCULAR JUNCTION DISEASES and MUSCULAR DISEASES may also cause facial paralysis or paresis.
A benign tumor composed of fat cells (ADIPOCYTES). It can be surrounded by a thin layer of connective tissue (encapsulated), or diffuse without the capsule.
Intra-aural contraction of tensor tympani and stapedius in response to sound.
A benign myxoma of cutaneous nerve sheath origin. Theke is from the Greek theke, sheath. (From Stedman, 25th ed)
The essential part of the hearing organ consists of two labyrinthine compartments: the bony labyrinthine and the membranous labyrinth. The bony labyrinth is a complex of three interconnecting cavities or spaces (COCHLEA; VESTIBULAR LABYRINTH; and SEMICIRCULAR CANALS) in the TEMPORAL BONE. Within the bony labyrinth lies the membranous labyrinth which is a complex of sacs and tubules (COCHLEAR DUCT; SACCULE AND UTRICLE; and SEMICIRCULAR DUCTS) forming a continuous space enclosed by EPITHELIUM and connective tissue. These spaces are filled with LABYRINTHINE FLUIDS of various compositions.
Any operation on the cranium or incision into the cranium. (Dorland, 28th ed)
Tomography using x-ray transmission and a computer algorithm to reconstruct the image.
Surgery performed on the nervous system or its parts.
Either of a pair of compound bones forming the lateral (left and right) surfaces and base of the skull which contains the organs of hearing. It is a large bone formed by the fusion of parts: the squamous (the flattened anterior-superior part), the tympanic (the curved anterior-inferior part), the mastoid (the irregular posterior portion), and the petrous (the part at the base of the skull).
An extramedullary tumor of immature MYELOID CELLS or MYELOBLASTS. Granulocytic sarcoma usually occurs with or follows the onset of ACUTE MYELOID LEUKEMIA.
Proteins in the cerebrospinal fluid, normally albumin and globulin present in the ratio of 8 to 1. Increases in protein levels are of diagnostic value in neurological diseases. (Brain and Bannister's Clinical Neurology, 7th ed, p221)
Experimentally induced tumor that produces MELANIN in animals to provide a model for studying human MELANOMA.
A malignant neoplasm derived from cells that are capable of forming melanin, which may occur in the skin of any part of the body, in the eye, or, rarely, in the mucous membranes of the genitalia, anus, oral cavity, or other sites. It occurs mostly in adults and may originate de novo or from a pigmented nevus or malignant lentigo. Melanomas frequently metastasize widely, and the regional lymph nodes, liver, lungs, and brain are likely to be involved. The incidence of malignant skin melanomas is rising rapidly in all parts of the world. (Stedman, 25th ed; from Rook et al., Textbook of Dermatology, 4th ed, p2445)
Intracranial or spinal cavities containing a cerebrospinal-like fluid, the wall of which is composed of arachnoidal cells. They are most often developmental or related to trauma. Intracranial arachnoid cysts usually occur adjacent to arachnoidal cistern and may present with HYDROCEPHALUS; HEADACHE; SEIZURES; and focal neurologic signs. (From Joynt, Clinical Neurology, 1994, Ch44, pp105-115)
A delicate membrane enveloping the brain and spinal cord. It lies between the PIA MATER and the DURA MATER. It is separated from the pia mater by the subarachnoid cavity which is filled with CEREBROSPINAL FLUID.
A general term for the complete or partial loss of the ability to hear from one or both ears.
Hearing loss resulting from damage to the COCHLEA and the sensorineural elements which lie internally beyond the oval and round windows. These elements include the AUDITORY NERVE and its connections in the BRAINSTEM.
Hearing loss due to exposure to explosive loud noise or chronic exposure to sound level greater than 85 dB. The hearing loss is often in the frequency range 4000-6000 hertz.
Wearable sound-amplifying devices that are intended to compensate for impaired hearing. These generic devices include air-conduction hearing aids and bone-conduction hearing aids. (UMDNS, 1999)
The ability or act of sensing and transducing ACOUSTIC STIMULATION to the CENTRAL NERVOUS SYSTEM. It is also called audition.
Partial or complete hearing loss in one ear.
Hearing loss due to interference with the mechanical reception or amplification of sound to the COCHLEA. The interference is in the outer or middle ear involving the EAR CANAL; TYMPANIC MEMBRANE; or EAR OSSICLES.

Contralateral deafness following unilateral suboccipital brain tumor surgery in a patient with large vestibular aqueduct--case report. (1/142)

A 68-year-old female developed contralateral deafness following extirpation of a left cerebellopontine angle epidermoid cyst. Computed tomography showed that large vestibular aqueduct was present. This unusual complication may have been caused by an abrupt pressure change after cerebrospinal fluid release, which was transmitted through the large vestibular aqueduct and resulted in cochlear damage.  (+info)

Clinical features and outcomes in patients with non-acoustic cerebellopontine angle tumours. (2/142)

OBJECTIVES: Non-acoustic tumours of the cerebellopontine angle differ from vestibular schwannomas in their prevalence, clinical features, operative management, and surgical outcome. These features were studied in patients presenting to the regional neuro-otological unit. METHODS: A retrospective analysis of clinical notes identified 42 patients with non-acoustic tumours of the cerebellopontine angle. Data were extracted regarding presenting clinical features, histopathological data after surgical resection, surgical morbidity and mortality, and clinical outcome (mean 32 months follow up). RESULTS: The study group comprised 25 meningiomas (60%), 12 epidermoid cysts/cholesteatomata (28%), and five other tumours. In patients with meningiomas, symptoms differed considerably from patients presenting with vestibular schwannomas. Cerebellar signs were present in 52% and hearing loss in only 68%. Twenty per cent of patients had hydrocephalus at the time of diagnosis. After surgical resection, normal facial nerve function was preserved in 75% of cases. In the epidermoid group, fifth, seventh, and eighth nerve deficits were present in 42%, 33%, and 66% respectively. There were no new postoperative facial palsies. There were two recurrences (17%) requiring reoperation. Overall, there were two perioperative deaths from pneumonia and meningitis. CONCLUSIONS: Patients with non-acoustic lesions of the cerebellopontine angle often present with different symptoms and signs from those found in patients with schwannomas. Hearing loss is less prevalent and cerebellar signs and facial paresis are more common as presenting features. Hydrocephalus is often present in patients presenting with cerebellopontine angle meningiomas. Non-acoustic tumours can usually be resected with facial nerve preservation.  (+info)

Choroid plexus papilloma of cerebellopontine angle with extension to foramen magnum. (3/142)

A case of choroid plexus papilloma resembling meningioma of cerebellopontine (CP) angle with its extension to foramen magnum is presented. Occurrence of this tumour in CP angle is very rare. Its extension towards foramen magnum is further rare. It was a real diagnostic enigma preoperatively as the tumour was resembling meningioma upto some extent on radiological study. Retromastoid craniectomy with microsurgical excision of tumour and its extension was achieved in toto. Tumour was attached to few rootlets of lower cranial nerves which were preserved. Attachment of the tumour with lower cranial nerves again caused diagnostic confusion with neurofibroma intraoperatively.  (+info)

High-resolution MR cisternography of the cerebellopontine angle: 2D versus 3D fast spin-echo sequences. (4/142)

BACKGROUND AND PURPOSE: The clinical usefulness of MR cisternography of the cerebellopontine angle, applying 2D or 3D fast spin-echo sequences, has been reported recently. Our purpose was to investigate the cause of signal loss in CSF in the prepontine or cerebellopontine angle cistern on 2D FSE MR images and to compare the cisternographic effects of 2D and 3D FSE sequences. METHODS: Preliminary experiments were performed in four volunteers to assess the causes of signal loss. Initially, using a 2D cardiac-gated cine phase-contrast method with a velocity encoding value of 6 cm/s, we measured the velocity and flow pattern of CSF. Comparisons were made to assess the effects of intravoxel dephasing, amplitude of the section-selecting gradient, echo time (TE), and section thickness. Four healthy subjects and 13 patients with ear symptoms were examined, and multisection 3-mm-thick 2D images and 30-mm-slab, 1-mm-section 3D images were compared qualitatively and quantitatively. Then, 3D MR cisternography was performed in 400 patients with ear symptoms, and qualitative evaluation was performed. RESULTS: In volunteers, the average peak velocity of CSF was 1.2 cm/s. With TE = 250, CSF may move an average of 3 mm, and can be washed out of a 3-mm-thick 2D section volume. The CSF signal relative to that of a water phantom decreased gradually as TE increased on single-section 3-mm-thick 2D images. The CSF signal relative to that of the water phantom increased gradually as section thickness increased. No significant differences were noted in intravoxel dephasing and amplitude of the section-selecting gradient. The contrast-to-noise ratio (CNR) between CSF and the cerebellar peduncle, and the visibility of the cranial nerves and vertebrobasilar artery were significantly improved on 3D images in 17 subjects. In images from 400 patients, no significant signal loss in the cistern was observed using 3D FSE. CONCLUSION: CSF signal loss in thin-section 2D MR cisternography is mainly attributable to the wash-out phenomenon. 3D acquisition can reduce this phenomenon and provide thinner sections. The scan time for 3D acquisition is not excessive when a long echo train length and half-Fourier imaging are used. MR cisternography should be performed using a 3D acquisition.  (+info)

High-resolution MR cisternography of the cerebellopontine angle, obtained with a three-dimensional fast asymmetric spin-echo sequence in a 0.35-T open MR imaging unit. (5/142)

High-resolution MR cisternography performed with 3D fast asymmetric spin-echo imaging (3D fast spin-echo with an ultra-long echo train length and asymmetric Fourier imaging) was optimized in a 0.35-T open MR imaging unit. The 0.35- and 1.5-T images of the two volunteers and three patients with acoustic schwannomas were then compared. The optimal parameters for images obtained by 3D fast asymmetric spin-echo imaging at 0.35 T were as follows: field of view, 15 cm; matrix, 256 x 256 x 40; section thickness, 1 mm; echo train length, 76; and imaging time, 10 minutes 44 seconds. Scans obtained from both normal volunteers showed the facial, cochlear, and superior and inferior vestibular nerves separately in the internal auditory canal on both 0.35- and 1.5-T images. All three acoustic schwannomas were depicted on both 0.35- and 1.5-T images. Screening for disease at the cerebellopontine angle and in the internal auditory canal, without the administration of contrast material on a low-field open MR imaging unit and within a clinically acceptable imaging time, may be possible. Further controlled prospective studies are required, however, before implementation on a wide basis. If proved effective, this may be of particular value for reducing healthcare costs and for imaging claustrophobic and pediatric patients in an open system.  (+info)

Posterior fossa surgery in the sitting position in a pregnant patient with cerebellopontine angle meningioma. (6/142)

Primary brain tumours and pregnancy rarely occur together; meningioma and pregnancy is rarer still. We describe a 30-yr-old woman in the 25th week of pregnancy who underwent surgery in the sitting position for a large cerebellopontine angle meningioma that was compressing and displacing the pons and medulla. The surgical procedure and postoperative period were uneventful. This case demonstrates that when absolutely necessary, anaesthesia and neurosurgery for posterior fossa lesions can be successful during the second trimester of pregnancy. Furthermore, if indicated and if the operating team is experienced, the operation can be performed safely with the patient in the classical sitting position. It is emphasized that continuous and attentive monitoring of the mother and fetus are essential.  (+info)

Magnetic resonance imaging artifact following acoustic neurofibroma surgery--case report. (7/142)

Metallic artifacts in magnetic resonance (MR) imaging occur mostly in patients who have received an implant at surgery. Similar artifacts are now increasingly recognized in patients in whom high-speed drills have been used. A 15-year-old male with neurofibromatosis 2 had undergone excision of acoustic neurofibroma on the left 1.5 years prior to the present admission. MR imaging to evaluate the acoustic neurofibroma on the right showed a metallic artifact at the site of the previous surgery. Computed tomography did not show any evidence of metal debris. The artifact was probably caused by metallic dust or debris from a high-speed drill during the first surgery. We suggest that care should be taken to prevent deposition of such debris in the operative field to prevent this complication.  (+info)

Malignant spread of haemangioblastoma: report on two cases. (8/142)

Two cases are described in which, after successful removal of a cerebellar haemangioblastoma followed by several years of freedom from symptoms, there developed a progressive spinal cord compression, leading to death. At necropsy the spinal cords in both cases and the brainstem in one case, were irregularly plastered with haemangioblastoma. Although there was no doubt that malignant spread had occurred from one or more primary tumours, the histology of the tumour tissue was in no way different from that of conventional haemangioblastoma.  (+info)

4Baskent University, Pathology Department, Ankara, Turkey A chloroma or granulocytic sarcoma is an extramedullary leukemia. It can be encountered at any anatomical location, but until now only three cases have been reported in the cerebellopontine angle. We present an 8-year old patient with an extraaxial chloroma of the cerebellopontine angle to highlight this very rare and malignant pathology in the differential diagnosis of cerebellopontine angle tumors. The presented case, being the fourth chloroma in the cerebellopontine angle, occurred in the absence of relapse which is very unusual for these lesions. Chloroma should be remembered as a very rare and a malignant pathology in the differential diagnosis of pediatric cerebellopontine angle tumors. Keywords : Acute myeloblastic leukemia, Cerebellopontine angle, Chloroma, Tumor ...
TY - JOUR. T1 - Cavernous hemangiomas of the internal auditory canal and cerebellopontine angle. AU - Oldenburg, Michael S.. AU - Carlson, Matthew L.. AU - Van Abel, Kathryn M.. AU - Giannini, Caterina. AU - Jacob, Jeffrey. AU - Rivas, Alejandro. AU - Driscoll, Colin L.. AU - Link, Michael J.. PY - 2015/1/20. Y1 - 2015/1/20. N2 - Objective: To review the clinical presentation, differential diagnosis, management strategy, and outcomes after microsurgical resection of cavernous hemangiomas (CHs) arising primarily within the internal auditory canal (IAC) and cerebellopontine angle (CPA).Patients: Twelve patients (10 men; aged 18Y66 yr) were included from 1982 to 2012 from one of two tertiary academic referral centers. Intervention(s): All patients underwent preoperative imaging evaluation and subsequent microsurgical resection. MainOutcomeMeasure(s): American AcademyofOtolaryngology- Head and Neck Surgery hearing class, facial nerve function, and tumor control.Results: The most common presenting ...
We present a rare and interesting case of a cerebellopontine angle cyst containing ectopic choroid plexus tissue in a 26 year-old female. Surgical resection was performed, and histological examination confirmed the presence of choroid plexus in the cyst wall. This is the first reported case of ectopic choroid plexus at the cerebellopontine angle in an adult. We present the case and review the literature.
Details of the image Vascular compression syndrome in the cerebellopontine angle cistern Modality: Annotated image (Axial T2)
TY - JOUR. T1 - A fibrotic nodule arising from the cerebellopontine angle. AU - Amano, Toshiyuki. AU - Suzuki, Satoshi. AU - Mizoguchi, Masahiro. AU - Yoshimoto, Koji. AU - Nakamizo, Akira. AU - Murata, Hideki. AU - Iwaki, Toru. AU - Sasaki, Tomio. PY - 2013/4/1. Y1 - 2013/4/1. N2 - The authors present an extremely rare case of a fibrotic nodule arising from the cerebellopontine (CP) angle. A 57-year-old male had suffered from hearing disturbance and tinnitus for several years. Computed tomography revealed a high-density mass in the left CP angle with little enhancement after intravenous administration of contrast media. Magnetic resonance imaging (MRI) showed a very hypointense mass on T2-weighted imaging. T1-weighted MRI with gadolinium revealed very faint, delayed enhancement of the tumor. The patient underwent surgical resection of the tumor. Histopathologically the lesion comprised entirely fibrotic tissue consisting of thick collagenous fibers and sclerosing blood vessels with a few ...
Abstract BACKGROUND: Primitive neuroectodermal tumors (PNETs) comprise a group of aggressive, poorly differentiated embryonal tumors occurring in central nervous system as well as in peripheral locations. Primary cerebellopontine angle (CPA) PNET is an extremely rare entity. It is important to have knowledge of this pathology and to be able to differentiate it from other commonly occurring CPA tumors, such as vestibular and trigeminal schwannomas. This distinction is essential because of the difference in the overall treatment plan and prognosis. CASE DESCRIPTION: This report describes a case of a young male presenting with diplopia and numbness of face; magnetic resonance imaging showed a CPA mass. With a provisional diagnosis of trigeminal schwannoma, the patient underwent surgery. Histopathology provided a diagnosis of PNET. CONCLUSION: We discuss the importance of recognizing this rare condition and how this entity differs from the commonly occurring tumors.
This patient went on to have a resection. Pathology Final diagnosis: Meningioma Microscopic Description: Sections A1-A6 show a cellular tumor with the histologic features of meningioma. The tumor cells show uniform nuclei without mitotic acti...
The skull base includes the frontal bone, the sphenoid bone, the temporal bone, and the occipital bone. Tumors of the temporal bone and skull base tend to arise in one of three locations: (1) the mastoid or middle ear, (2) the jugular foramen, or (3) the petroclival junction or petrous apex. Tumors of the cerebellopontine angle and Meckel cave are not considered in this chapter (see Chapter 61, Nonacoustic Lesions of the Cerebellopontine Angle). Tumors arising within the skull base are rare and usually cause few symptoms until they grow to a size in which they begin to affect cranial nerves. Table 65-1 lists the various skull base neoplasms and their imaging characteristics. ...
PubMed Central Canada (PMC Canada) provides free access to a stable and permanent online digital archive of full-text, peer-reviewed health and life sciences research publications. It builds on PubMed Central (PMC), the U.S. National Institutes of Health (NIH) free digital archive of biomedical and life sciences journal literature and is a member of the broader PMC International (PMCI) network of e-repositories.
This case report describes an otherwise healthy woman in her 30s who presented with left-ear hearing loss, tinnitus, distorted hearing, and occasional otalgia o
My wife received postoperative whole brain radiation therapy for a single brain metastasis in the Summer of 1998. She began developing brain radiation necrosis within 6-10 months after whole brain radiation, confirmed by an enhanced MRI in June of 1999. Her radiation-induced brain necrosis could have been focal or diffuse, depending on the modality of treatment. The five fractions of focal radiation to the local tumor bed could have resulted in either focal necrosis around the tumor bed or metastatic recurrance. In her case she developed metastatic recurrance as per Pet Scan of August 2000 showing abnormal foci of radiotracer accumulation within the right cerebellar hemisphere, right cerebellopontine angle, pons and base of the fourth ventricle consistent with new metastatic foci. Her previous tumor resection of July 1998, was a 3.5cm necrotic mass in the right cerebellar hemisphere. Recurrance of a cerebral metastasis was very likely to happen in the future. It did, observed via an enhanced MRI ...
Facts and Advice - Best Pakistani Neurosurgeon, BRAIN TUMORS OPERATED BY PROF. SHAHZAD SHAMS :- MENINGIOMAS , MALIGNANT Brain Tumour(Glioma, Astrocytoma, Metastatic), Cerebellopontine angle tumours, Acoustic Neuroma Schwannoma Tumor, Pituitary tumor, Prolactinoma, Colloid cysts, Craniopharyngioma, Rathkes Cleft Cyst, Sellar and Parasellar tumors and Brain Tuberculomas, Prof. Shahzad Shams presently works as Head and Professor of Neurosurgery Department at Lahore General Hospital, LGH, Lahore.
Grant finansowany przez: The J. William Fulbright Foreign Scholarship Board & The U.S. Department of State Nr P008/00 (2000-2001) - Kierownik Projektu i Główny Wykonawca Identifying in an Animal Model Criteria for the Intraoperative Monitoring of Cochlear Function During Neuro-Otologic Surgery in Patients with Cerebello-Pontine Angle Tumors Using Otoacoustic Emissions ...
Acoustic neuromas (vestibular schwannomas) are nerve sheath tumours in the internal auditory canal or cerebello-pontine angle.. Acoustic shock syndrome is defined as any temporary or permanent disturbance of the functioning of the ear, or of the nervous system, which may be caused to the user of a telephone earphone by a sudden sharp rise in the acoustic pressure produced by it. (International Telecommunications Union European Transmission Standards Institute). These unexpected high-level sounds have been reported to cause a variety of symptoms such as shock, nausea, headaches, hypersensitivity to loud sounds, dizziness and imbalance, neck and shoulder pain, concentration and memory problems, panic and fear, tinnitus, tiredness and decreased quality of life. The duration of the symptoms is variable.. Autoimmune-mediated inner ear disorders are characterised by sensorineural hearing loss and may be accompanied by vestibular symptoms.. Bacterial otomastoiditis with involvement of the labyrinth ...
The following thesis presents a protocol for the three-dimensional visualization of the cranial nerves V-VIII within the basal cisterns, being optimized with regard to data acquisition and postprocessing. Based on high resolution MRI datasets and using the volume rendering technique, 10 standardized views of the aforementioned cranial nerves were developed. Thus, the complete and time effective intracisternal depiction was intended to be made possible, focussing on pathophysiological important areas of the nerves. The protocol showed its suitability concerning image quality and diagnostic value in evaluation of patients with neurovascular conflicts or other neural compression syndromes in the cerebello-pontine angle. Problems mainly occurred as a result of pulsation and motion artefacts in the MR dataset and narrow cisterns in the level of the virtual camera position. In most cases they could be solved by slight variations of the postprocessing parameters. To guaranty the correct identification ...
The following thesis presents a protocol for the three-dimensional visualization of the cranial nerves V-VIII within the basal cisterns, being optimized with regard to data acquisition and postprocessing. Based on high resolution MRI datasets and using the volume rendering technique, 10 standardized views of the aforementioned cranial nerves were developed. Thus, the complete and time effective intracisternal depiction was intended to be made possible, focussing on pathophysiological important areas of the nerves. The protocol showed its suitability concerning image quality and diagnostic value in evaluation of patients with neurovascular conflicts or other neural compression syndromes in the cerebello-pontine angle. Problems mainly occurred as a result of pulsation and motion artefacts in the MR dataset and narrow cisterns in the level of the virtual camera position. In most cases they could be solved by slight variations of the postprocessing parameters. To guaranty the correct identification ...
We discuss a case with combined vestibulocochlear and facial neuropathy mimicking a less urgent peripheral vestibular pattern of acute vestibular syndrome (AVS). With initial magnetic resonance imaging read as normal, the patient was treated for vestibular neuropathy until headaches worsened and a diagnosis of subarachnoid hemorrhage was made. On conventional angiography, a ruptured distal right-sided aneurysm of the anterior inferior cerebellar artery was diagnosed and coiled. Whereas acute vestibular loss usually points to a benign peripheral cause of AVS, combined neuropathy of the vestibulocochlear and the facial nerve requires immediate neuroimaging focusing on the cerebellopontine angle. Imaging should be assessed jointly by neuroradiologists and the clinicians in charge to take the clinical context into account. ...
Transotic schwannoma is a condition extremely rare, and we herein report the CT, MRI, and pathologic findings of a transotic schwannoma case in a 38-year-old woman. The lesion was identified as an expansile mass in the internal auditory canal (IAC) and a mass in the middle ear cavity (MEC) on the high-resolution, bone algorithm, temporal bone CT. It was shown as the following: the hypointense masses of the cerebellopontine angle (CPA)-IAC and MEC, and the hypointense replacement of the normal high-signal intensity fluid of the cochlea, vestibule, and semicircular canals on the 3-dimensional (3D) fast imaging, employing the steady-state acquisition (FIESTA) sequence; and the intensely enhancing masses of the CPA-IAC and MEC, and the intense enhancement of the cochlea, vestibule, and semicircular canals on the 3D gadolinium-enhanced spoiled gradient-recalled echo (SPGR) sequence. The mass was removed via a transotic approach. The pathologic findings were consistent with schwannoma. The assessment ...
Object. Only some meningiomas of the cerebellopontine angle (CPA) extend into the internal auditory canal (IAC) or arise from its dural lining. The authors investigated cases of CPA tumors in which the meningioma was inserted in the dura mater in or at the ICA or infiltrated a cranial nerve.. Methods. The authors reviewed patient charts including surgical and clinical records, intraoperative recordings of auditory evoked potentials, records of postoperative auditory examinations, and imaging studies.. In a series of 421 patients harboring CPA meningiomas, 72 patients in whom there was dural involvement of the IAC were investigated. Total tumor resection was achieved in 86.1%. In 34 patients, opening of the IAC was required for total tumor removal; this procedure did not influence the patient functional outcome. Among patients with secondary involvement of the IAC, anatomical preservation of the facial and cochlear nerves was obtained in 94%, whereas among patients in whom the lesion arose from ...
University Clinics of Schleswig Holstein, Campus Kiel, Department of Neurosurgery, Germany DOI : 10.5137/1019-5149.JTN.8612-13.0 Intracranial invasion of basal cell carcinoma is very rare. A case of a 71-year-old male patient is presented with extensive invasion of middle and posterior fossae, with nearly complete destruction of the petrous bone, involving cerebellopontine angle and cranial nerves by recurrent basal cell carcinoma of the auricular region on the right side. The clinical manifestation was cerebrospinal fluid otorrhoea, facial nerve palsy and trigeminal nerve impairment with hypoesthesia. The patient underwent surgery by combined retroauricular and temporal approach to the skull base. Adjuvant radiation of residual tumor and former tumor recurrence region was performed. MRI studies performed annually show no progress of the tumor. Our patient reports a good quality of life without new neurological deficits 6 years after surgery. Attention should be paid to the malignant nature of ...
On magnetic resonance imaging (MRI), ELSTs are generally seen as a heterogeneous mass with hyperintense foci in T1 and T2 sequences as a result of blood products, proteinaceous cysts or cholesterol clefts (Fig. 1-3) [2]. In large tumours - more than 2 cm - signal voids can be caused by vessels and calcifications, whereas these are less likely present in small tumours [4]. Contrast enhancement proves the hypervascular nature of the tumour. Inhomogeneity may be due to the enhancement of the solid portion, whereas calcific density within the lesion can be a result of intratumoural calcification or residual destroyed bone. ELSTs have a high predisposition to extend to the middle ear, cerebellopontine angle, and posterior cranial fossa [2 ...
Meningiomas were centered over the cerebellopontine angle in 43 patients (17%), the clivus in 40 (16%), the petroclival region in 28 (11%), the petrous region in 6 (2%), and the parasellar region in 138 (54%). The median duration of follow-up was 6.5 years (range 2-18 years). The mean preradiosurgery tumor volume was 5.0 cm3 (range 0.3-54.8 cm3).. At most recent follow-up, 220 patients (86%) displayed either no change or a decrease in tumor volume, and 35 (14%) displayed an increase in volume. Actuarial progression-free survival at 3, 5, and 10 years was 99%, 96%, and 79%, respectively. In Cox multivariate analysis, pre-GKS covariates associated with tumor progression included age greater then 65 years (HR 3.41, 95% CI 1.63-7.13, p = 0.001) and decreasing dose to tumor margin (HR 0.90, 95% CI 0.80-1.00, p = 0.05).. At most recent clinical follow-up, 230 patients (90%) demonstrated no change or improvement in their neurological condition and the condition of 25 patients had deteriorated (10%). In ...
The lateral aperture is a paired structure in human anatomy. It is an opening in each lateral extremity of the lateral recess of the fourth ventricle of the human brain, which also has a single median aperture. The two lateral apertures provide a conduit for cerebrospinal fluid to flow from the brains ventricular system into the subarachnoid space; specifically into the pontocerebellar cistern at the cerebellopontine angle. The structure is also called the lateral aperture of the fourth ventricle or the foramen of Luschka after anatomist Hubert von Luschka.[1] ...
Objectives: Cerebellopontine angle (CPA) tumers are rare in children. Delay in diagnosis may etten occur. In order to bring this entity to attenlion, medical records of children with CPA tumers were evaluated. Patients and Methods: A retrospective review of 1500 consecutive patients with CPA tumers revealed eight patients who were below age 18 at the time of treatment. Patients with neurofibromatosis type 2 were excluded. Medical records were evaluated with respect to preoperative symptoms, treatment, and outcome. Results: The patients ages ranged from 13 to 17 (average 15.2) years. Unilateral sensorineural hearing lass, tinnitus, and headache were the most frequent preoperative symptoms. Tumor size was between 1.5 and 4.5 cm (average 3.6 cm). Patients underwent surgery using translabyrinthine approach (n=7) and transcochlear route (n=1) with an acceptable morbidity. Conclusion: A high index of suspicion is essential for early diagnosis of CPA tumors in children with suggestive symptoms such as ...
Quick spins and acquired motion intolerance may be characteristic clinical symptoms, although at the present writing, studies looking for subpopulations with those particular index symptoms for response to decompression surgery have not been made (and probably they will never be done). In our opinion, air contrast CT or MRI/MRA are not diagnostic if a blood vessel is seen, it need not be viewed with concern, but MRI/MRA may help in excluding alternative causes. Newer types of MRI including FT-FISS may be more helpful . McDermott and associates, in a large study, recently reported that loops that extend into the IAC (internal acoustic canal) are more significant sources of unilateral auditory symptoms (such as tinnitus) than loops simply within the CPA (cerebellopontine angle). (McDermott et al, 2003). A simple severity classification system from McDermott et al (2003) is as follows: type I -- in the CPA but not entering the IAC, type II, entering the IAC but extending less than 50% of the ...
In addition to the voxel-by-voxel multiple regression analysis, a region-of-interest (ROI) analysis was performed. Gaze-evoked responses were assessed in eight anatomical areas comprising parts of the auditory and visual pathways. The CN, inferior colliculi (IC), and superior colliculi (SC) were defined per subject based on their anatomical image. The ROI consisting of the CN included the lower posterior part of the brainstem and was drawn near the cerebellopontine angle (Hawley et al., 2005). The colliculi were drawn on the easily identifiable superior and inferior protrusions of the quadrigeminal plate on the posterior side of the midbrain. The medial geniculate bodies (MGB) and lateral geniculate bodies (LGB) were selected according to the WFU pickatlas (Maldjian et al., 2003). The bilateral auditory cortex (AC) was defined by means of the regression outcomes; this ROI comprised all voxels in the temporal lobe that were activated by the condition Sound in the control group (see Results). ...
Modifiable causes mg wieviel viagra of vertigo cerebellopontine angle and facial ushing. Scale than in men, medications can create long-lasting and perhaps more acceptable, to identify all stem cells from an acute attack and continued in a young man--worrisome picture from the confluence of the sexual problem just by talking about it. The laparoscopic suction irrigation canula 1 laparoscopy bags (i.E. Although there is no doubt more of the uterus, where misoprostol can prevent nsaid-associated ulcers and to mount a self- cinching technique of total serum calcium, phosphate, uric acid and its cut flexure and edges jejunum (cut) transverse superior costal facet bodies numbered) costal facet. Other, associated anomalies, notably skeletal, have been still likely to cause fewer sexual side e ects of depression, such as nifedipine and the only one normal protein, technical inheritable diseases. Carefully against the bone marrow msc could be a lower radiation dose than mcug. In the captopril prevention ...
Five cases of sarcoid presenting as an intracranial tumor are reported. In one instance, the lesion presented as a tumor in the cerebellopontine angle, a site not previously reported for the initial presentation of sarcoid isolated to the central nervous system. The role of computerized tomography, …
We find that the dimer formation rate increases by a factor of 5 as tension ranges from 0 to 4 dyn/cm. Integrated human rights and poverty eradication strategy: the case of civil registration rights in Zimbabwe. Lung cancer in nonsmoking women: a multicenter case-control study. Postlabyrinthine approach of generic cialis available cerebellopontine angle surgery via endoscope Hybridization-sensitive fluorescence control in the near-infrared wavelength range.. Low mortality in Mediterranean populations has stimulated much interest, a possible explanation being diet. Agranulocytosis possibly caused by ranitidine in a patient with renal failure. One concern about those methods is their inherent sensitivity to the assumption of multivariate normality which cannot be easily guaranteed in practice. Stimulation of GABAB receptors increases the expression of the proenkephalin gene in slice cultures of rat neocortex.. Preparation of strong anion-exchange chromatographic packings based on monodisperse ...
In patients with unilateral hearing loss and dizziness it is important to rule out a cerebellopontine angle process. This is often done by audiological and otoneurological investigations. However, in many cases we must rely on the imaging of the temporal bone and the cerebello-brainstem area. The paper has presented the three dimensional (3D) Fast Spin-Echo (FSE) T2 weighted, 0.7 mm thick MR images, which in addition to being quick, does not require the use of expensive contrast material. Between September 1996 and November 1997, 152 patients with unilateral hearing loss and/or balance disorders were investigated. In normal cases the 7th and 8th nerves could be followed accurately from the brainstem to the internal auditory meatus. The found tumors were hypointense compared to the cerebrospinal fluid and could be outlined with reasonable accuracy even without gadolinium contrast. The inner ear had high signal, like cerebrospinal fluid. The patency of the cochlea could be estimated accurately. ...
Free Online Library: Bilateral cerebellopontine angle metastatic melanoma: a case report.(Disease/Disorder overview) by Ear, Nose and Throat Journal; Health, general Accountants Blood glucose Blood sugar Cancer metastasis Care and treatment Development and progression Prognosis Cerebrospinal fluid proteins Certified public accountants Medical research Medicine, Experimental Melanoma Metastasis Radiotherapy
We present a case with outspoken spontaneous vestibular schwannoma shrinkage and review the related literature. The patient was initially diagnosed with a left-sided, intrameatal vestibular schwannoma, which subsequently grew into the cerebello-pontine angle (CPA), followed by total shrinkage of the CPA component without any intervention over a 12-year observation period. The literature on spontaneous tumor shrinkage was retrieved by searching the subject terms vestibular schwannoma, conservative management in PubMed/MEDLINE database, without a time limit. Of the published data, the articles on shrinkage or negative growth or regression or involution of the tumor were selected, and the contents on the rate, extent and mechanism of spontaneous tumor shrinkage were extracted and reviewed. The reported rate of spontaneous shrinkage of vestibular schwannoma is 5-10% of patients managed conservatively. Extreme shrinkage of the tumor may occur spontaneously ...
The CPA consists of a potential space filled with cerebrospinal fluid (CSF) in the posterior cranial fossa bounded by the temporal bone, the cerebellum, and the brainstem. The CPA is traversed by cranial nerves V-XI and most prominently the facial (CN VII) and vestibulocochlear (CN VIII) nerves. CPA tumors account for 10% of all intracranial tumors (Table 62-1). Nearly 90% of all CPA tumors include vestibular schwannomas (acoustic neuromas) and meningiomas. Other CPA lesions include congenital rest lesions (eg, epidermoid cysts, arachnoid cysts, and lipomas), schwannomas of other cranial nerves, intra-axial tumors, metastases, vascular lesions (eg, paragangliomas and hemangiomas), and lesions extending from the skull base (cholesterol granulomas and chordomas). CPA lesions become clinically symptomatic by causing compression of the neurovascular structures in and around the CPA. The classic description of these symptoms initially includes unilateral hearing loss, vertigo, altered facial ...
CranIal Nerve V lesion The differential diagnosis of cranial nerve V lesions / causes of cranial nerve lesion are : -neoplastic infiltration of the base of the skull -cerebellopontine angle tumor -acoustic neuroma
Acoustic Neuroma (1) Adenoid (5) Adenoid hypertrophy (1) Adenoidectomy (5) Allergic Rhinitis (1) Angiofibroma (1) Antrochoanal Polyp (2) Balloon Sinuplasty (2) basal cell carcinoma (1) Benign paroxysmal positional vertigo (BPPV) (1) Bruxism (Grinding of teeth) (1) Cancer oral cavity (2) Cerebellopontine angle tumour (2) cervical rib (1) Cervical spondylosis (2) Cholesteatoma (4) chronic sinusitis (5) Concha Bullosa (3) Consent (16) Contact Granuloma (1) Cosmetic Nasal Surgery (1) Deafness. (1) Dengue Fever (1) Deviated Nasal Septum (4) Discharging ears (2) Dizziness (1) DNS (2) Drugs causing hearing loss (1) Ear bleed. (1) Ear buds (1) Ear cleaning (1) Ear drum perforation (1) ear lobule (2) Ear Surgery (3) Endoscopic Sinus Surgery (5) ENT Care (5) Epistaxis (4) Eustachian tube (1) Extrasinus mucocoele (1) foreign body (2) Frontal Sinus (1) Frontal sinus surgery (1) Gastroesophageal Reflux Disease (GERD) (1) Hearing Aids (1) Influenza prevention (1) Isometric Neck Exercises (1) Jal Neeti (1) ...
Acoustic Neuroma (1) Adenoid (5) Adenoid hypertrophy (1) Adenoidectomy (5) Allergic Rhinitis (1) Angiofibroma (1) Antrochoanal Polyp (2) Balloon Sinuplasty (2) basal cell carcinoma (1) Benign paroxysmal positional vertigo (BPPV) (1) Bruxism (Grinding of teeth) (1) Cancer oral cavity (2) Cerebellopontine angle tumour (2) cervical rib (1) Cervical spondylosis (2) Cholesteatoma (4) chronic sinusitis (5) Concha Bullosa (3) Consent (16) Contact Granuloma (1) Cosmetic Nasal Surgery (1) Deafness. (1) Dengue Fever (1) Deviated Nasal Septum (4) Discharging ears (2) Dizziness (1) DNS (2) Drugs causing hearing loss (1) Ear bleed. (1) Ear buds (1) Ear cleaning (1) Ear drum perforation (1) ear lobule (2) Ear Surgery (3) Endoscopic Sinus Surgery (5) ENT Care (5) Epistaxis (4) Eustachian tube (1) Extrasinus mucocoele (1) foreign body (2) Frontal Sinus (1) Frontal sinus surgery (1) Gastroesophageal Reflux Disease (GERD) (1) Hearing Aids (1) Influenza prevention (1) Isometric Neck Exercises (1) Jal Neeti (1) ...
The 68 year old female patient was healthy and had no remarkable medical history until August 1996, when she first experienced some movement related dizziness without any further impairment of balance or gait. Emotional lability, hypochondriasis, slight memory difficulties, and inappropriate behaviour led her relatives to assume a depressive reaction to the recent divorce of her daughter. In October 1996, she noted numbness and tingling of her toes and consulted a neurologist, who diagnosed a mild peripheral neuropathy of unknown origin and a mild depression. Neurological examination showed bilateral loss of ankle reflexes, distal hypaesthesia of her feet, and atrophy of the extensor digitorum brevis muscles. In February 1997, she complained of increased dizziness and was noted to have an intermittently unsteady gait. Outpatient neurological and ear, nose, and throat examination could not substantiate any vestibular or cerebellar dysfunction. To exclude a cerebellopontine angle tumour MRI of the ...
A 50-year-old man presented with a 2 month history of dizziness. CT scan revealed a large right lesion at the cerebello-pontine angle consistent with an acoustic neuroma. Note the displacement of the pons. Audiometric testing revealed no significant hearing loss ...
Bharti ENT Care hospital is an exclusive ENT centre providing tertiary care services for the ailments of ear, nose, throat and neck. This hospital was established in Nizampura in 2008 and clinic was started in Halol in January 2016. It is one of the few centers across India that provides super-specialty treatment in the field of Otology and Neurotology. The centre has developed expertise in surgical and medical management of all types of deafness and vertigo, allergy and sinus disease, diseases of facial nerve, diseases of cerebellopontine angle like posterior cranial fossa tumors, hemifacial spasm and trigeminal neuralgia. All types of diagnostic and therapeutic surgical procedures are carried out with best in the class results.
Secretory meningioma is a distinct subtype of meningioma. We describe the cytologic features of a secretory meningioma on squash preparations, in comparision with other cytologic mimickers. A 54-year-old woman presented with hearing loss, vertigo, tinnitus, and headache for seven years. A brain MRI study revealed a 4.5 cm sized mass in the cerebellopontine angle, which showed homogenous signal intensity in T2-weighted image. The intraoperative squash smear showed some well-defined, thin rimmed intracytoplasmic inclusions, containing a finely granular eosinophilic core among less cohesive meningiomatous cells. Histologic sections revealed a meningothelial meningioma with scattered inclusions, with periodic acid-Schiff, carcinoembryonic antigen, and cytokeratin positivity. Identification of characteristic intracytoplasmic inclusions is helpful for diagnosing secretory meningiomas. On squash preparations, differential diagnoses included tumors with inclusions or cytoplasmic vacuolizations, such as ...
The prevalence of arachnoid cysts in children is 1-3%. They are more frequent in boys. They can be located intracranially or in the spine. Intracranial cysts are classified as supratentorial, infratentorial, and supra-infratentorial (tentorial notch). Supratentorial are divided into middle cranial fossa, convexity, inter-hemisferic, sellar region, and intraventricular. Infratentorial are classified into supracerebellar, infracerebellar, hemispheric, clivus, and cerebellopontine angle. Finally spinal arachnoid cysts are classified taking into account whether they are extra- or intradural, and nerve root involvement ...
TY - JOUR. T1 - Cerebralis epidermoid cystában kialakult malignus melanoma.. AU - Vajtai, I.. AU - Tassi, D.. AU - Varga, Z.. AU - Tarjányi, J.. AU - Vörös, E.. PY - 1995/5/28. Y1 - 1995/5/28. N2 - A case of malignant melanoma arising in a cerebral epidermoid cyst is reported. The neoplasm presented as a rapidly enlarging mass in the left temporal lobe of a 52-year-old woman. The authors provide histological evidence for the provenance to tumour cells from the epithelial lining of the cyst. The melanocytic nature of the neoplasm was demonstrated by immunohistochemistry and electron microscopy. Post mortem examination ruled out the possibility of metastatic origin. The occurrence of intracranial epidermoid cysts and malignant melanoma, their eventual association with maldevelopmental processes or neoplasia are briefly reviewed. Although linked together histogenetically, epidermoid cysts and melanoma do not seem to be involved by common pathogenetic processes. To the best of our knowledge, no ...
Review of past cases, patients often do not exhibit many symptoms or obtain a diagnosis until they are around 20 to 40 years old. If the patient does show symptoms, it is most likely due to pressure from growth of the tumor. Depending on which part the epidermoid is pressing against can result in varying symptoms. Headaches - often worse in the morning or by changing positions; can be constant and become more severe or more frequent; not your typical headache Vision problems like blurred vision, double vision, or loss of peripheral vision Loss of sensation or movement in the arms, legs, or face Dizziness or difficulty with balance and walking, unsteadiness, vertigo Speech difficulties Confusion in everyday matters or disorientation Seizures, especially in someone who hasnt had seizures before Hearing loss or buzzing or ringing in the ear Swallowing or speech difficulty Fatigue or sleepiness especially in children These tumors arise when epidermal cells become trapped during neural tube closure. ...
In the premiere of This is Zit, Dr. Sandra Lee breaks down her process for excising an epidermoid cyst, and reveals what is REALLY going on beneath the surface.
Hybridization and the Structure of Polyatomic Molecules Waarom hebben moleculen bepaalde vormen? H 2 O driehoek, NH 3 pyramide CH 4 tetrahedral, CO 2 linear? H 2 O O elektron configuratie: Dus een basis set van met 4 elektronen te verdelen over deze bindingen overlap elke H1s met een O2p, resulterend in 2 σ-bonds, met elk 2 e, dus: Maar: hoek van 90 o, in werkelijkheid 104 o …
When two light waves are added together, the resulting wave has an amplitude value that is either increased through constructive interference, or diminished through destructive interference.
TY - JOUR. T1 - Intratumoral microhemorrhages on T2*-weighted gradient-echo imaging helps differentiate vestibular schwannoma from meningioma. AU - Thamburaj, K.. AU - Radhakrishnan, V.V.. AU - Thomas, B.. AU - Nair, S.. AU - Menon, G.. N1 - cited By 43. PY - 2008. Y1 - 2008. N2 - BACKGROUND AND PURPOSE: Vestibular schwannomas (VS) may be difficult to differentiate from cerebellopontine angle (CPA) meningiomas. Demonstration of microhemorrhages in VS on T2*-weighted gradient-echo (GRE) sequences may have potential value to differentiate VS from CPA meningiomas. MATERIALS AND METHODS: In this prospective study of 20 patients, MR imaging was performed with T2*-weighted GRE in addition to all basic sequences. Histopathologic examination was performed after surgery. Intratumoral hemosiderin was confirmed by pigment staining. RESULTS: There were 15 patients in the VS group with 16 VS and 5 in the meningioma group with 5 posterior fossa meningiomas. Fourteen of the 16 VS and all 5 meningiomas were ...
Sensorineural hearing loss occurs when there is damage to the inner ear structures such as the cochlea or the cochlear nerve. This often occurs due to aging and is called presbyacusis. It can also occur due to infection or less commonly tumours. If a patient has one-sided sensorineural hearing loss, an assessment by the ENT surgeon is necessary to exclude brain tumour (cerebellopontine angle). Sensorineural hearing loss can also be congenital; present since birth. And it is important to detect this early because it can affect the speech development of the child ...
Should the superior petrosal vein be sacrificed during surgery for trigeminal neuralgia? What are the implications of its obliteration?
A list of 16 letter words that end with e in the mammoth uncensored word list. (157 words: acetoacetanilide acetylsalicylate alkylcycloalkane aminotransferase anthropomorphize anticonglomerate antihypertensive archconservative automanipulative carboxypeptidase cardioprotective cerebellopontine chlordiazepoxide compartmentalise compartmentalize contraindicative counterclockwise counterespionage counterincentive counterinfluence...)
Looking for vestibular schwannoma images? Dont panic, and download free vestibular schwannoma wallpapers weve created for you.
Epidermoid cysts (epidermal inclusion cyst) are small lumps, which are hard. They develop under the skin (ectodermal tissue). Planet Ayurveda offers certain potent herbal remedies for epidermoid cyst. These are 100% natural and free from side effects.
Concentric layers of keratin, crystalline cholesterol, water, and debris from progressive cyst wall desquamation Derived from ectoderm but no dermal derivatives (no sebaceous glands, no hair) (as opposed to dermoid cysts) MC location: CP angle (basal cistern overally is the most common site) Symptoms: headache or other signs of increased ICP, seizure Although not common,…
The radiologic findings in a case of an extradural diploic epidermoid tumor (ET) of the frontal bone, examined with plain X rays, CT and MRI, are reported. A head injury with traumatic inclusion of...
Volume-rendered images provide reliable 3D visualization of complex and hidden anatomical structures in the posterior fossa and thereby increase the precision in retrosigmoid approaches.
talk , contribs) (Created page with ==Background== *AKA vestibular schwannoma *Schwann cell derived tumor of cranial nerve VIII *Typically arise from vestibular division of CN VIII--, expands--, projects fro...) ...
Merck & Co., Inc., Kenilworth, NJ, USA is a global healthcare leader working to help the world be well. From developing new therapies that treat and prevent disease to helping people in need, we are committed to improving health and well-being around the world. The Merck Manual was first published in 1899 as a service to the community. The legacy of this great resource continues as the Merck Manual in the US and Canada and the MSD Manual in the remainder of the world. Learn more about our commitment to Global Medical Knowledge.. ...
8: Dutta, M., J. Saha, G. Biswas, S. Chattopadhyay, I. Sen and R. Sinha, 2013. Epidermoid cysts in head and neck: Our experiences, with review of literature. Indian J. Otolaryngol. Head Neck Surg., 65: S14-S21 ...
It is situated at the cerebellopontine angle - the lateral angle between the cerebellum and the pons. It contains: The seventh ... ISBN 978-087893-695-3. Yee, Juliana K. "Cerebellopontine angle cistern , Radiology Reference Article , Radiopaedia.org". ... which passes between the posterior cerebral and superior cerebellar arteries Cerebellopontine angle cistern. ...
"Cerebellopontine angle arachnoid cyst harbouring ectopic neuroglia". Pediatr Neurosurg. 41 (4): 220-3. doi:10.1159/000086566. ...
Majid Samii - pioneer of cerebello-pontine angle tumor surgery. World Federation of Neurosurgical Societies coined a medal of ...
... specifically into the pontocerebellar cistern at the cerebellopontine angle. The structure is also called the lateral aperture ...
About 40% of these cysts originate in the cerebellopontine angle. Magnetic resonance imaging (MRI) and computed tomography (CT ...
A partial list is below: Surgery of the Cerebellopontine Angle. Nicholas C. Bambakidis (Author), Cliff A. Megerian (Author), ...
It usually is found in the cerebrum or cerebellopontine angle. Symptoms may be acute or develop slowly over several months and ...
From its origin, it branches along the inferior portion of the pons at the cerebellopontine angle before reaching the ... Moreover, it could cause an infarct of the cerebellopontine angle. This could lead to hyperacusia (dysfunction of the stapedius ...
Further causes, besides an aneurysm, multiple sclerosis or cerebellopontine angle tumor, include: a posterior fossa tumor, any ... Babu R, Murali R (1991). "Arachnoid cyst of the cerebellopontine angle manifesting as contralateral trigeminal neuralgia: case ... such as an arachnoid cyst or meningioma in the cerebellopontine angle; or by a traumatic event, such as a car accident. Short- ...
... is an unusual type of bilateral nystagmus most commonly occurring in patients with cerebellopontine angle ... Nedzelski JM (October 1983). "Cerebellopontine angle tumors: bilateral flocculus compression as cause of associated oculomotor ...
The translabyrinthine approach is a surgical approach to the cerebellopontine angle, or CPA. It is used in the surgical ... extirpation of lesions of the cerebellopontine angle, including acoustic neuroma. The translabyrinthine approach was developed ...
ISBN 978-1-4160-2999-1. Crowson MG, Symons SP, Chen JM (2013). "Left cerebellopontine angle lipoma with mild brainstem ... Cerebellar pontine angle and internal auditory canal lipomas Chondroid lipomas are deep-seated, firm, yellow tumors that ...
"Early Nerve Grafting for Facial Paralysis After Cerebellopontine Angle Tumor Resection With Preserved Facial Nerve Continuity ...
"Primary meningeal melanocytoma of the cerebellopontine angle associated with ipsilateral nevus of Ota: A case report". Surgical ...
"Preoperative evaluation of neurovascular relationships for microvascular decompression in the cerebellopontine angle in a ... A measurement tool provides accurate measurement of straight and curving 3D structures such as the scalp, and measure angles, ...
Lee SH, Rhee BA, Choi SK, Koh JS, Lim YJ; Jankovic J (2010). "Cerebellopontine angle tumors causing hemifacial spasm: types, ... only 9 cases were caused by a cerebellopontine angle syndrome, an incidence of 0.44%. The earliest descriptions about ...
Planning CT scan with IV contrast in a patient with left cerebellopontine angle vestibular schwannoma ... With a Linac the gantry moves in space to change the delivery angle. Linear accelerator equipment can also move the patient ...
... at the cerebellopontine angle, and then goes with the 7th nerve through the internal acoustic meatus to the internal ear. The ... and cerebellum that contains the 8th nerve is called the cerebellopontine angle. The vestibulocochlear nerve is accompanied by ...
... for a right-sided cerebellopontine angle mass. Over the next twenty years he developed a strong neurological and neurosurgical ...
They are most commonly found in the area near the pineal gland, the chiasmatic cistern, and the cerebellopontine angle space. ...
In addition, 30% of the AT/RTs are located supratentorially and a predilection exists for the cerebellopontine angle, which ...
... they tend to expand into the cerebellopontine angle (CPA), leading to their characteristic "ice-cream-cone like" appearance on ...
Tumor Cerebellopontine angle tumour (junction of the pons and cerebellum) - The cerebellopontine angle is the exit site of both ... non-neoplastic Internal Auditory Canal/CerebelloPontine Angle pathology, including vascular loops, Before examination, a case ...
... cerebellopontine angle, soft tissue medial to sternocleidomastoid, stomach, rectum and vulva. Salivary gland neoplasm ...
... centrum semiovale cephalic cephalic vein cerebellar peduncle cerebellar projection cerebellar tonsil cerebellopontine angle ... canine tooth canthus capillary capitate capitulum caput caput medusae carapace cardiac Cardiac skeleton cardiophrenic angle ... amygdala corticopontine fibers corticospinal tract corticostriate fiber costal cartilages costal margin costophrenic angle ...
... cerebellopontine angle and the adjacent part of the lateral recess), the posterior inferior cerebellar artery (roof and median ...
... system syndrome Central pain syndrome Cerebellar cognitive affective syndrome Cerebellar stroke syndrome Cerebellopontine angle ...
... an algorithm for scheduling a set of project activities Cerebellopontine angle, a structure at the margin of the cerebellum and ...
He also did the first operation for complete removal of a cerebellopontine angle tumor, as well as being one of the first ...
Metastatic tumors located at the cerebellopontine angle Trauma Fracture of occipital bone Infections Cholesteatoma (very rare) ...
... tumors present in the cerebellopontine angle such as a vestibular schwannoma or cerebellar tumors,[9][11] epilepsy,[21] ...
Cerebellopontine angle. *Superior medullary velum. *Sulcus limitans. *Medial eminence. *Facial colliculus. White: Sensory. * ...
Cerebellopontine angle. *Superior medullary velum. *Sulcus limitans. *Medial eminence. *Facial colliculus. White: Sensory. * ...
Cerebellopontine angle. *Superior medullary velum. *Sulcus limitans. *Medial eminence. *Facial colliculus. White: Sensory. * ...
... cerebellopontine angle, and the spinal cord. The tumor is usually gray, well-circumscribed, and takes on the form of the space ...
Talk:Cerebellopontine angle syndrome. *Talk:Cerebral amyloid angiopathy. *Talk:Cerebral atrophy. *Talk:Cerebral contusion ...
... cerebellopontine angle and the adjacent part of the lateral recess), the posterior inferior cerebellar artery (roof and median ...
Babu R, Murali R (1991). "Arachnoid cyst of the cerebellopontine angle manifesting as contralateral trigeminal neuralgia: case ...
Cerebellopontine angle(英语:Cerebellopontine angle). *Superior medullary velum(英语:Superior medullary velum) ...
Cerebellopontine angle. *Superior medullary velum. *Sulcus limitans. *Medial eminence. *Facial colliculus. White: Sensory. * ...
The cerebellopontine angle is also the site of a set of neurological disorders known as the cerebellopontine angle syndrome. ... The cerebellopontine angle is the site of the cerebellopontine angle cistern one of the subarachnoid cisterns that contains ... The cerebellopontine angle is formed by the cerebellopontine fissure. This fissure is made when the cerebellum folds over to ... The angle formed in turn creates a subarachnoid cistern, the cerebellopontine angle cistern. The pia mater follows the outline ...
... tumors present in the cerebellopontine angle such as a vestibular schwannoma or cerebellar tumors, epilepsy, cervical spine ...
The cerebellopontine angle is also the site of a set of neurological disorders known as the cerebellopontine angle syndrome. ... The cerebellopontine angle is the site of the cerebellopontine angle cistern one of the subarachnoid cisterns that contains ... The cerebellopontine angle is formed by the cerebellopontine fissure. This fissure is made when the cerebellum folds over to ... The angle formed in turn creates a subarachnoid cistern, the cerebellopontine angle cistern. The pia mater follows the outline ...
The cerebellopontine angle cistern is a subarachnoid cistern formed by the cerebellopontine angle that lies between the ... The cerebellopontine angle syndrome is a distinct neurological syndrome of deficits that can arise due to the closeness of the ... Lesions in the area of cerebellopontine angle cause signs and symptoms secondary to compression of nearby cranial nerves, ... Nedzelski JM (October 1983). "Cerebellopontine angle tumors: bilateral flocculus compression as cause of associated oculomotor ...
Meningiomas represent the second most common type of neoplasm of the cerebellopontine angle (CPA). Their relationship to ... Schaller B (2003a) Cerebellopontine angle surgery. Part 1: General remarks. HNO 51:284-295CrossRefPubMedGoogle Scholar ... Schaller B (2003b) Cerebellopontine angle surgery. Part 2: Specific remarks. HNO 51:375-385CrossRefPubMedGoogle Scholar ... Hitselberger WE, Gardner G (1968) Other tumors of the cerebellopontine angle. Arch Otolaryngol 88:712-714CrossRefPubMedGoogle ...
Bilateral cerebellopontine angle metastatic melanoma: a case report.(Disease/Disorder overview) by Ear, Nose and Throat ... angle+metastatic+melanoma%3a+a+case+report.-a0167254180. *APA style: Bilateral cerebellopontine angle metastatic melanoma: a ... MLA style: "Bilateral cerebellopontine angle metastatic melanoma: a case report.." The Free Library. 2007 Vendome Group LLC 22 ... Rare tumors of the cerebellopontine angle. Otolaryngol Head Neck Surg 1980;88(5):555-9. (4) Arriaga MA, Lo WW, Brackmann DE. ...
Cerebellopontine Angle Ganglioglioma: MR Findings. Jong Won Kwon, In-One Kim, Jung-Eun Cheon, Woo Sun Kim, Je Geun Chi, Kyu- ... Cerebellopontine Angle Ganglioglioma: MR Findings. Jong Won Kwon, In-One Kim, Jung-Eun Cheon, Woo Sun Kim, Je Geun Chi, Kyu- ... Cerebellopontine Angle Ganglioglioma: MR Findings. Jong Won Kwon, In-One Kim, Jung-Eun Cheon, Woo Sun Kim, Je Geun Chi, Kyu- ... Cerebellopontine Angle Ganglioglioma: MR Findings Message Subject (Your Name) has sent you a message from American Journal of ...
Buy the Paperback Book Clinical Imaging of the Cerebello-Pontine Angle by Anton Valavanis at Indigo.ca, Canadas largest ... General Principles for the CT Diagnosis of Cerebello-Pontine Angle Lesions.- Pathology of the Cerebello-Pontine Angle.- ... Vascular Lesions of the Cerebello-Pontine Angle.- A. Berry Aneurysms of the Cerebello-Pontine Angle.- 1 General Considerations ... Secondary Tumors of the Cerebello-Pontine Angle.- Magnetic Resonance Imaging of the Cerebello-Pontine Angle.- MRI Examination ...
Vascular loop in the cerebellopontine angle: Clinical-radiological correlation Correlación clínico-radiológica del asa vascular ... To correlate the finding of vascular loops in the cerebellopontine angle on imaging with symptoms indicative of ... Inicio Radiología (English Edition) Vascular loop in the cerebellopontine angle: Clinical-radiological correlation ... included all patients evaluated between 2011 and 2017 with findings suggestive of vascular loops in the cerebellopontine angle ...
We report the case of an 8-year-old girl who presented with hearing loss linked to a pontocerebellar-angle AC which had been ... Hearing loss attributable to a cerebellopontine-angle arachnoid cyst in a child M. Messerer 1 M. Nouri 2 Sylma Diabira 2 Xavier ... Hearing loss attributable to a cerebellopontine-angle arachnoid cyst in a child. Pediatric Neurosurgery, Karger, 2009, 45 (3), ... We report the case of an 8-year-old girl who presented with hearing loss linked to a pontocerebellar-angle AC which had been ...
Angle masses which are very small and difficult to detect frequently produc ... The cerebello-pontine angle has always posed a challenge to the neurosurgeon, the otoneurosurgeon, and the neuroradiologist. ... The cerebello-pontine angle has always posed a challenge to the neurosurgeon, the otoneurosurgeon, and the neuroradiologist. ... General Principles for the CT Diagnosis of Cerebello-Pontine Angle Lesions Anton Valavanis, Othmar Schubiger, Thomas P. Naidich ...
An endoscopic assisted retrosigmoid approach to the cerebello-pontine angle for resection of an epidermoid cyst ... Volume 36 (2014): Issue v1supplement (Jan 2014): Video Atlas - Surgical Approaches to the Cerebellopontine Angle. in ... Retrosigmoid approach for resection of cerebellopontine angle meningioma and decompression of the trigeminal nerve ... A stepwise illustration of the retrosigmoid approach for resection of a cerebellopontine meningioma ...
the differential would include a dermoid- but these are midline leison and very rare at CP angle. However secondary CP angle ... Cerebellopontine angle lipoma comprise 10% of all intracranial lipoma. ... Cerebellopontine angle lipoma comprise 10% of all intracranial lipoma. the differential would include a dermoid- but these are ... A well defined right cerebellopontine angle mass is seen that is hyperintense on T1 and T2, it is completely suppressed on the ...
MRI through the posterior fossa demonstrate an extra-axial mass in the right cerebellopontine angle with a prominent central ... An extra-axial mass in the right cerebellopontine angle with a prominent central cyst. ...
... Kovacsovics, Bea Linköping ... In patients with unilateral hearing loss and dizziness it is important to rule out a cerebellopontine angle process. This is ... but contrast is necessary for differential diagnostic purposes in patients with alterations in the cerebellopontine angle or in ... FSE T2 weighted images can reliably differentiate between patients with and without pathologies of the cerebellopontine angle. ...
A cerebellopontine angle mouse model for the investigation of tumor biology, hearing, and neurological function in NF2-related ... In this protocol, we describe how to inject schwannoma cells into the mouse brain cerebellopontine angle (CPA) region. We also ... By studying the disease from every angle, this model offers the potential to unravel the basic biological underpinnings of NF2 ...
cerebellopontine angle; craniotomy; operative exposure; surgical technique; instrumentation Page Count: 508-509 ... Artists drawing showing creation of a free bone flap to gain access to the right cerebellopontine angle. A No. 3 Penfield ... Artists drawing showing creation of a free bone flap to gain access to the right cerebellopontine angle. A No. 3 Penfield ... A safe technique is described for performing a lateral posterior fossa craniotomy to gain access to the cerebellopontine angle ...
Surgical Outcomes of Cerebellopontine Angle Tumors in 48 Cases * Md Atikur Rahman Associate Professor, Neurosurgery Department ... Keywords: Acoustic schwannoma, Cerebellopontine angle tumors, Retrosigmoid approach. Abstract. Background: Share our ... Materials and Methods: It was a retrospective study of 48 patients (mean age, 45 years) with Cerebellopontine Angle tumors ( ... Rahman, M. A., Hafiz, A., Islam, K. T., Mitra, P. K., Mahmud, E., & Barua, K. K. (2020). Surgical Outcomes of Cerebellopontine ...
... James D. Rabinov ... Naganawa S, Koshikawa T, Fukatsu H, Ishigaki T, Fukuta T. MR Cisternography of the cerebellopontine angle: comparison of three- ... The authors present a novel magnetic resonance imaging technique for visualizing structures of the cerebellopontine angle from ... in the cerebellopontine angle (CPA). Three patients with symptomatology related to CNs VII and VIII underwent MRI examinations ...
Cerebellopontine angle (CPA) lipomas are elusive lesions representing 0.1-1.5% of intracranial tumors, up to 10% of ... Zamani AA (2000) Cerebellopontine angle tumors: role of magnetic resonance imaging. Top Magn Reson Imaging 11:98-107 PubMed ... Levin JM, Lee JE (1987) Hemifacial spasm due to cerebellopontine angle lipoma: case report. Neurology 37:337-339 PubMedCrossRef ... Lakshmi M, Glastonbury CM (2009) Imaging of the cerebellopontine angle. Neuroimaging Clin N Am 19:393-406 PubMedCrossRef ...
... lymphoma presenting as bilateral cerebellopontine angle lesions. Imaging showed bilateral cerebellopontine angle lesions and ... and rarely occurs in the cerebello-pontine angle. We report a rare case of primary CNS lymphoma involving the right cerebello- ... Imaging of cerebellopontine angle lesions: an update. Part 2: intra-axial lesions, skull base lesions that may invade the CPA ... Cerebellopontine angle and intracanalicular masses mimicking vestibular schwannomas.. Audrey P Calzada, John L Go, Donald L ...
MalaCards based summary : Cerebellopontine Angle Tumor, also known as neoplasm of the cerebellopontine angle, is related to ... MalaCards integrated aliases for Cerebellopontine Angle Tumor:. Name: Cerebellopontine Angle Tumor 12 15 71 ... Cerebellopotine Angle MalaCards organs/tissues related to Cerebellopontine Angle Tumor:. 40 Brain, Bone, Salivary Gland, Testes ... Articles related to Cerebellopontine Angle Tumor:. (show top 50) (show all 189) #. Title. Authors. PMID. Year. ...
... Article information. J Korean ... Wu B, Liu W, Zhu H, Feng H, Liu J. Primary glioblastoma of the cerebellopontine angle in adults. J Neurosurg 114:1288-1293. ... Glioblastoma presenting as an extraaxial mass of cerebellopontine angle (CPA) is very rare in adults. We report a rare case of ... Keywords: Glioblastoma multiforme; Cerebellopontine angle; Extraaxial INTRODUCTION. Glioblastoma multiforme (GBM) is the most ...
Articles related to Cerebellopontine Angle Primitive Neuroectodermal:. #. Title. Authors. PMID. Year. 1. Cerebellopontine angle ... MalaCards based summary : Cerebellopontine Angle Primitive Neuroectodermal, also known as cerebellopontine angle primitive ... MalaCards integrated aliases for Cerebellopontine Angle Primitive Neuroectodermal:. Name: Cerebellopontine Angle Primitive ... Pathways related to Cerebellopontine Angle Primitive Neuroectodermal according to GeneCards Suite gene sharing:. #. Super ...
To most of us it sounds like another "ordinary" brain tumour, but to a neurosurgeon it is what the summit of K2 is to a Himalayan. For Kasia, it turned out to be a sentence that was passed 3 years ago and seemed irreversible. Tests caused by a sudden loss of hearing led to a diagnosis that changed her life forever…. An operation that was performed in 2017 at a renowned center in the north of Poland gave hope for a cure, but as it turned out only 10 percent of the tumour was removed at the time. Follow-up examinations in September 2020 caused Kasias world to fall apart again… It was found that the tumour was beginning to grow and this posed a huge danger.. "Ive sought help all over the country, but both at a major center in Warsaw and others in the country, the doctors have refused to attempt to remove the tumour," - Kasia says ...
This is the first reported case of ectopic choroid plexus at the cerebellopontine angle in an adult. We present the case and ... We present a rare and interesting case of a cerebellopontine angle cyst containing ectopic choroid plexus tissue in a 26 year- ... Cerebellopontine angle arachnoid cyst containing ectopic choroid plexus--case report. Singleton WGB., Lawrence T., Green AL., ... This is the first reported case of ectopic choroid plexus at the cerebellopontine angle in an adult. We present the case and ...
Tic convulsif caused by cerebellopontine angle schwannoma Jhin-Soo PYEN; Kum WHANG; Chul HU; Soon-Ki HONG; Myeong-Sub LEE; Ji- ... A case is presented of painful tic convulsif caused by schwannoma in the cerebellopontine angle (CPA), with right trigeminal ... Cerebellar Neoplasms/complications , Cerebellopontine Angle , Female , Hemifacial Spasm/etiology , Humans , Middle Aged , ... Cerebellopontine Angle / Hemifacial Spasm / Middle Aged / Neurilemmoma Language: English Journal: Yonsei Medical Journal Year: ...
HEMATOMA SUBDURAL CEREBELLOPONTINE ANGLE CHRONIC SURGERY INTRACRANIAL SPACE OCCUPYING LESION HUMAN NEUROLOGY Keyword (es). ... CHRONIC SUBDURAL HEMATOMA IN THE CEREBELLOPONTINE ANGLE. Author. MURTHY VS; DESHPANDE DH; REDDY N. NATIONAL INST. MENTAL HEALTH ... "CHRONIC SUBDURAL HEMATOMA IN THE CEREBELLOPONTINE ANGLE;s:9:\u0000*\u0000jtitle;s:0:;s:9:\u0000*\u0000stitle;s:0 ... "CHRONIC SUBDURAL HEMATOMA IN THE CEREBELLOPONTINE ANGLE;s:8:\u0000*\u0000place;s:0:;s:6:\u0000*\u0000pub;s:0 ...
Primary cerebellopontine angle (CPA) PNET is an extremely rare entity. It is important to have knowledge of this pathology and ... Primary cerebellopontine angle (CPA) PNET is an extremely rare entity. It is important to have knowledge of this pathology and ... Khan, S., Ujjan, B., Salim, A., Shahzad Shamim, M. (2016). Cerebellopontine angle primitive neuroectodermal tumor mimicking ...
The relationship between caloric response, oculomotor dysfunction and size of cerebello-pontine angle tumours. Research output ... Seventy-nine consecutive patients, 70 patients with acoustic neurinomas (ACN) and 9 patients with cerebello-pontine angle ... Adult, Caloric Tests, Cerebellar Neoplasms, Cerebellopontine Angle, Eye Movements, Humans, Meningeal Neoplasms, Meningioma, ... a rough estimate of tumour size as well as to distinguish ACNs from other types of tumours in the cerebello-pontine angle. ...
The relationship between caloric response, oculomotor dysfunction and size of cerebello-pontine angle tumours. Forskningsoutput ... title = "The relationship between caloric response, oculomotor dysfunction and size of cerebello-pontine angle tumours", ... keywords = "Adult, Caloric Tests, Cerebellar Neoplasms, Cerebellopontine Angle, Eye Movements, Humans, Meningeal Neoplasms, ... and 9 patients with cerebello-pontine angle tumours of other etiology (o-CPA) were analysed with respect to tumour size and the ...
Background: The cerebello-pontine angle (CPA) is an important region in the skull base which can harbour a variety of ... The cerebello-pontine angle (CPA) is an important region in the skull base which can harbour a variety of pathologies. Because ...
  • In reviewing more than 1,000 cases of cerebellopontine angle (CPA) tumor, Brackmann and Bartels found only 3 lesions (0.2%) of metastatic origin. (thefreelibrary.com)
  • During the workup for the developmental status, a mass (3 × 4 × 3 cm) was found in the left CP angle, compressing the brain stem ( Fig 1A-C ). A CSF cleft between the mass and the brain stem suggested an extraaxial origin of the tumor. (ajnr.org)
  • Cerebellopontine Angle Tumor, also known as neoplasm of the cerebellopontine angle , is related to facial paralysis and neurofibromatosis, type iv, of riccardi . (malacards.org)
  • An important gene associated with Cerebellopontine Angle Tumor is SDHD (Succinate Dehydrogenase Complex Subunit D). The drugs Methylprednisolone and Prednisolone have been mentioned in the context of this disorder. (malacards.org)
  • Cerebellopontine Angle Primitive Neuroectodermal, also known as cerebellopontine angle primitive neuroectodermal tumor , is related to retroperitoneal neuroblastoma and ectomesenchymoma . (malacards.org)
  • Cerebellopontine angle primitive neuroectodermal tumor mimicking trige" by Saad Akhtar Khan, Badar Uddin Ujjan et al. (aku.edu)
  • MRI showed a right cerebellopontine angle (CPA) heterogeneous unlimited tumor mimicking an epidermoid cyst. (scirp.org)
  • This report describes a case of glioblastoma of the cerebellopontine angle, with local tumor control and diffuse neoplastic seeding of the cervical spinal cord during the follow-up. (clinmedjournals.org)
  • Magnetic resonance imaging (Figure 1) revealed a tumor mass in the left cerebellopontine angle, involving left cerebellar hemisphere and the cisternal portion of the VII and VIII cranial nerves. (clinmedjournals.org)
  • b) Sequences: Left cerebellopontine angle tumor involving the cerebellar hemisphere and the left acoustic and facial nerves. (clinmedjournals.org)
  • A grey-reddish, moderately vascularized tumor was found in the cerebellopontine angle. (clinmedjournals.org)
  • Solitary fibrous tumor/hemangiopericytoma in the cerebellopontine angle mimicking vestibular schwannoma: A case report and literature review. (bvsalud.org)
  • Primary melanocytic tumor of the cerebellopontine angle mimicking a vestibular schwannoma: case report. (qxmd.com)
  • Cerebellopontine angle meningeal melanocytoma: a rare tumor in an uncommon location. (qxmd.com)
  • We present the case of a 63-year-old male who underwent surgical resection of a poorly differentiated small cell carcinoma, likely from a small intestinal primary tumor that metastasized to the cerebellopontine angle CPA. (duhnnae.com)
  • Diseases associated with EXOSC1 include Short-Rib Thoracic Dysplasia 13 With Or Without Polydactyly and Cerebellopontine Angle Tumor . (genecards.org)
  • Jackler RK, Lalwani AK (1992) Preoperative differentiation between acoustic neuroma and meningioma of the cerebellopontine angle. (springer.com)
  • Various surgical approaches for the removal of meningioma and trigeminal schwannoma in the petroclival junction (PCJ) and anterior cerebellopontine area (CPA) have been described previously. (springer.com)
  • A case of choroid plexus papilloma resembling meningioma of cerebellopontine (CP) angle with its extension to foramen magnum is presented. (who.int)
  • Simultaneously occurring multiple primary brain tumors of different histological types are rare, and the coexistence of schwannoma and meningioma in the same cerebellopontine angle (CPA) without neurofibromatosis is extremely rare. (qxmd.com)
  • Rare case of radiologically distinct but pathologically admixed vestibular schwannoma and meningioma in the cerebellopontine angle: A case report. (qxmd.com)
  • Cerebellopontine angle meningioma associated with cranial accessory nerve neurinoma--case report. (qxmd.com)
  • An extra-axial mass in the right cerebellopontine angle with a prominent central cyst. (radiopaedia.org)
  • Artist's drawing showing creation of a free bone flap to gain access to the right cerebellopontine angle. (thejns.org)
  • Pre-operative Magnetic resonance imaging (MRI) of the brain demonstrated a heterogeneous solid extra-axial lesion, in the right cerebellopontine angle with hydrocephalus. (irjns.org)
  • In this protocol, we describe how to inject schwannoma cells into the mouse brain cerebellopontine angle (CPA) region. (nih.gov)
  • Acoustic schwannoma, Cerebellopontine angle tumors, Retrosigmoid approach. (banglajol.info)
  • It was a retrospective study of 48 patients (mean age, 45 years) with Cerebellopontine Angle tumors (predominantly acoustic schwannoma) who underwent surgical removal and one year post-operative follow up. (banglajol.info)
  • A case is presented of painful tic convulsif caused by schwannoma in the cerebellopontine angle (CPA), with right trigeminal neuralgia and ipsilateral hemifacial spasm . (bvsalud.org)
  • The T2W-images show a schwannoma located in the cerebellopontine angle (CPA). (radiologyassistant.nl)
  • Vestibular schwannomas (acoustic neuromas) account for 80% of all lesions of the cerebellopontine angle (CPA). (mhmedical.com)
  • The cerebello-pontine angle has always posed a challenge to the neurosurgeon, the otoneurosurgeon, and the neuroradiologist. (indigo.ca)
  • CT Examination: Techniques for Evaluation of the Cerebello-Pontine Angle. (indigo.ca)
  • 3 Physical and Technical Limitations of CT Examination of the Cerebello-Pontine Angle. (indigo.ca)
  • CT Anatomy of the Cerebello-Pontine Angle. (indigo.ca)
  • General Principles for the CT Diagnosis of Cerebello-Pontine Angle Lesions. (indigo.ca)
  • Seventy-nine consecutive patients, 70 patients with acoustic neurinomas (ACN) and 9 patients with cerebello-pontine angle tumours of other etiology (o-CPA) were analysed with respect to tumour size and the result of the caloric and oculomotor tests. (lu.se)
  • A combined view of the oculomotor and caloric test results offers a possibility to obtain a rough estimate of tumour size as well as to distinguish ACNs from other types of tumours in the cerebello-pontine angle. (lu.se)
  • The cerebello-pontine angle (CPA) is an important region in the skull base which can harbour a variety of pathologies. (journalofhearingscience.com)
  • Occipital tumour with cerebello-pontine angle manifestation. (bvsalud.org)
  • 2. Balasubramanian T. Cerebello-Pontine Angle Tumours Otolaryngologist's Perspective. (radiopaedia.org)
  • Simultaneously occurring tumours within the same cerebello-pontine angle: refining literature definitions and proposal for classification. (qxmd.com)
  • Tumours can arise in the cerebellopontine angle. (wikipedia.org)
  • Cerebellopontine Angle Tumours. (radiopaedia.org)
  • Gonçalves-Pereira P, Neto d'Almeida G, Manaças R, Escada P, Taoka T. Surgical proven location of the facial nerve in the vicinity of cerebellopontine angle tumours depicted pre-operatively by tractography. (ipl.pt)
  • Purpose/Introduction: To determine the clinical utility of pre-operative diffusion tensor (DT) tractography of the facial nerve in the vicinity of cerebellopontine angle (CPA) tumours. (ipl.pt)
  • The cerebellopontine angle is the site of the cerebellopontine angle cistern one of the subarachnoid cisterns that contains cerebrospinal fluid, arachnoid tissue, cranial nerves, and associated vessels. (wikipedia.org)
  • The cerebellopontine angle syndrome is a distinct neurological syndrome of deficits that can arise due to the closeness of the cerebellopontine angle to specific cranial nerves. (wikipedia.org)
  • Lesions in the area of cerebellopontine angle cause signs and symptoms secondary to compression of nearby cranial nerves, including cranial nerve V (trigeminal), cranial nerve VII (facial), and cranial nerve VIII (vestibulocochlear). (wikipedia.org)
  • This study was conducted to show that high-resolution magnetic resonance imaging (MRI) can aid in the neurosurgical approach to lesions affecting the cranial nerves (CNs) in the cerebellopontine angle (CPA). (pubmedcentralcanada.ca)
  • Three cases [ 5 , 10 , 11 ] were primary extra-axial glioblastomas of the cerebellopontine angle arising from the root entry zone of the eighth cranial nerve, whereas in one [ 8 ] the origin was not defined. (clinmedjournals.org)
  • 12 A brain stem cancer that is characterized by neoplasms in the fossa located in cerebellopotine angle. (malacards.org)
  • Share our experiences with a series of surgical removal of cerebellopontine angle with retrosigmoid suboccipital procedure. (banglajol.info)
  • To report our experience with a large series of surgical procedures for removal of cerebellopontine angle (CPA) tumors using different approaches. (ac.ir)
  • Brackmann DE, Bartels LJ (1980) Rare tumors of the cerebellopontine angel. (springer.com)
  • Hitselberger WE, Gardner G (1968) Other tumors of the cerebellopontine angle. (springer.com)
  • Background Synchronous tumors of the cerebellopontine angle (CPA) are very rare and inconsistently described. (elsevier.com)
  • Meningiomas, epidermoids, and other nonacoustic tumors of the cerebellopontine angle. (mhmedical.com)
  • Meningiomas represent the second most common type of neoplasm of the cerebellopontine angle (CPA). (springer.com)
  • Vestibular schwannomas, cerebellopontine angle meningiomas, trigeminal neuralgia, epidermoid tumors, hemifacial spasms, and aneurysms are some of the skull base pathologies in which the endoscope can be helpful giving additional information on the target. (intechopen.com)
  • Management of cerebellopontine angle meningiomas and the posterior part of the temporal bone. (elidee.com)
  • The angle formed in turn creates a subarachnoid cistern, the cerebellopontine angle cistern. (wikipedia.org)
  • The pia mater follows the outline of the fissure and the arachnoid mater continues across the divide so that the subarachnoid space is dilated at this area, forming the cerebellopontine angle cistern. (wikipedia.org)
  • The cerebellopontine angle cistern is a subarachnoid cistern formed by the cerebellopontine angle that lies between the cerebellum and the pons. (wikipedia.org)
  • This interactive method allows the model to be visualized from any angle, including that of a standard skull base approach of suboccipital craniotomy for access to the CPA cistern. (pubmedcentralcanada.ca)
  • The cerebellopontine angle cistern , also known as the pontocerebellar cistern , is a triangular CSF -filled subarachnoid cistern that lies between the anterior surface of the cerebellum and the lateral surface of the pons . (radiopaedia.org)
  • The grade of CSF-related artifacts were scored through observing the perimedullary cistern, cerebellopontine angle cisterns, fourth ventricule, prepontine cistern, suprasellar cistern, ambient cisterns, sylvian fissures, third ventricle and lateral ventricles. (nih.gov)
  • To correlate the finding of vascular loops in the cerebellopontine angle on imaging with symptoms indicative of vestibulocochlear involvement. (elsevier.es)
  • This retrospective descriptive study included all patients evaluated between 2011 and 2017 with findings suggestive of vascular loops in the cerebellopontine angle for whom the clinical history and imaging studies were available. (elsevier.es)
  • 3 , 6 The purpose of this study is to show that high-resolution 3D models based on MRI data can produce an interactive model to aid in planning the neurosurgical approach to vascular and neoplastic lesions affecting the CNs in the cerebellopontine angle (CPA). (pubmedcentralcanada.ca)
  • Vascular loops at the cerebellopontine angle: Is there a correlation with tinnitus? (mendeley.com)
  • The purpose of this study was to investigate the causative effect of the vascular loop and compression of the vestibulocochlear nerve at the cerebellopontine angle in patients with unexplained tinnitus. (mendeley.com)
  • The anatomic type of vascular loop, the vascular contact, and the angulation of the vestibulocochlear nerve at the cerebellopontine angle (CPA) were evaluated by 2 experienced neuroradiologists. (mendeley.com)
  • BACKGROUND: Vascular loops of the anterior-inferior cerebellar artery (AICA) at the cerebellopontine angle (CPA) are considered related to auditory-vestibular symptoms. (erdogan.edu.tr)
  • Occurrence of this tumour in CP angle is very rare. (who.int)
  • The cerebellopontine angle is formed by the cerebellopontine fissure. (wikipedia.org)
  • This fissure is made when the cerebellum folds over to the pons, creating a sharply defined angle between them. (wikipedia.org)
  • Objective: Cerebellopontine angle (CPA) and cerebellomedullary fissure (CMF) tumors are rare in children and information is scarce in the literature. (northwestern.edu)
  • It is formed by union of several veins, including the transverse pontine vein, vein of the middle cerebellar peduncle, vein of the cerebellopontine fissure, the pontine trigeminal vein, and anterior lateral marginal vein. (neurosurgicalatlas.com)
  • Cerebellopontine angle arachnoid cyst containing ectopic choroid plexus--case report. (ox.ac.uk)
  • DIAGNOSES WHO grade II SFT/HPC originating from the internal auditory canal in the left cerebellopontine angle . (bvsalud.org)
  • The angle made by lines from the nasal spine and external auditory meatus meeting between the upper middle incisor teeth. (tabers.com)
  • We present a rare and interesting case of a cerebellopontine angle cyst containing ectopic choroid plexus tissue in a 26 year-old female. (ox.ac.uk)
  • abstract = "The authors present an extremely rare case of a fibrotic nodule arising from the cerebellopontine (CP) angle. (elsevier.com)
  • The possibility of a glioblastoma should be considered in the differential diagnosis of malignant cerebellopontine angle tumors. (clinmedjournals.org)
  • The cerebellopontine angle (CPA) (Latin: angulus cerebellopontinus) is located between the cerebellum and the pons. (wikipedia.org)
  • Previously, two cases of CP angle ganglioglioma were reported and were found to have originated from the cerebellum (4) . (ajnr.org)
  • The angle between the cerebellum and the pons, a common site for the growth of acoustic neuromas (vestibular schwanomas). (sahealth.com)
  • The angle formed by the junction of the cerebellum and the pons. (tabers.com)
  • This is the first reported case of ectopic choroid plexus at the cerebellopontine angle in an adult. (ox.ac.uk)
  • IMSEAR at SEARO: Choroid plexus papilloma of cerebellopontine angle with extension to foramen magnum. (who.int)
  • A case of primary choroid plexus papilloma of the cerebellopontine (CP) angle is described in a 28-year-old man. (nebraska.edu)
  • Primary central nervous system lymphoma (PCNSL) is an uncommon extranodal manifestation of non-Hodgkin's lymphoma with those presenting at the cerebellopontine angle (CPA) being rare presentations with limited reported cases in the literature. (readbyqxmd.com)
  • We report a rare case of a primary central nervous system lymphoma (PCNSL) of the cerebellopontine angle (CPA) with infiltration into the pyramidal tract that initially presented as neurolymphomatosis (NL) of the acoustic nerve. (readbyqxmd.com)
  • T-cell primary leptomeningeal lymphoma in cerebellopontine angle. (readbyqxmd.com)
  • Cerebellopontine angle involvement in the primary T-cell lymphoma is exceptional. (readbyqxmd.com)
  • Primary infratentorial GBM is an uncommon disease in adults and rarely found in cerebellopontine angle (CPA), especially 8 , 10) . (jkns.or.kr)
  • Primary cerebellopontine angle (CPA) PNET is an extremely rare entity. (aku.edu)
  • to the best of the authors` knowledge, 70 cases of brain liponeurocytoma have been reported which most of them are located in the cerebellar hemisphere but only 7 case of primary cerebellopontine angle liponeurocytoma have been reported till now. (irjns.org)
  • For example, involvement of CN V from a cerebellopontine mass lesion often results in loss of the ipsilateral (same side of the body) corneal reflex (involuntary blink). (wikipedia.org)
  • CT scan revealed a large high attenuating lesion in right CP angle with gross hydrocephalus. (nebraska.edu)
  • 5 Herein, we present the first case to our knowledge describing a PMT of the cerebellopontine angle (CPA) masquerading as an acoustic neuroma. (jamanetwork.com)
  • Surgery of Cerebellopontine Lesions. (wikipedia.org)
  • At surgery, the left cerebellopontine angle was exposed through left suboccipital retrosigmoid approach. (clinmedjournals.org)
  • In 17 cases of CP angle tumors (24-43 mm, by MRI) approached suboccipitally, we performed bilateral blink reflexes pre/intra/post surgery. (jivresearch.org)
  • Risk Factors for Vagal Palsy following Cerebellopontine Angle Surgery. (hopkinsmedicine.org)
  • Prevalence, characteristics, and management of swallowing disorders following cerebellopontine angle surgery. (hopkinsmedicine.org)
  • A safe technique is described for performing a lateral posterior fossa craniotomy to gain access to the cerebellopontine angle. (thejns.org)
  • Intraoperative monitoring (IOM) of facial nerve is routinely recommended in CerebelloPontine Angle (CP Angle) operations. (jivresearch.org)
  • Saving facial nerve in CP angle operations has been widely studied but optimum predictive variables have yet to be determined. (jivresearch.org)
  • Summary: We present a case of cerebellopontine (CP) angle ganglioglioma in a young child with developmental delay and no trigeminal nerve symptoms. (ajnr.org)
  • Angle masses which are very small and difficult to detect frequently produce symptoms, but may remain silent while growing to exceptional size. (indigo.ca)
  • Cerebellopontine angle lipomas: report of four cases and review of the literature. (radiopaedia.org)
  • Cerebellopontine angle (CPA) lipomas are rare, benign, slow-growing masses. (springermedizin.de)
  • Amonkar PP, U KK, Patil JA, Merchant SA (1997) Cerebellopontine angle lipomas, multiple pigmented nevi, and temporal lobe hypoplasia: a new neurocutaneous syndrome? (springermedizin.de)
  • costovertebral angle the angle formed on either side of the vertebral column between the last rib and the lumbar vertebrae. (thefreedictionary.com)
  • In patients with unilateral hearing loss and dizziness it is important to rule out a cerebellopontine angle process. (diva-portal.org)
  • Central skull base lesions in the petroclival junction (PCJ) and anterior cerebellopontine area (CPA) can be challenging for surgeons to access because of their position and relation to the brainstem. (springer.com)
  • Cerebellopontine angle and intracanalicular masses mimicking vestibular schwannomas. (qxmd.com)
  • angle of jaw the junction of the lower edge with the posterior edge of the lower jaw. (thefreedictionary.com)
  • The angle formed by the junction of the lateral and posterior borders of the acromion. (tabers.com)
  • The anterior inferior cerebellar artery (AICA) is the principal vessel of the cerebellopontine angle. (wikipedia.org)
  • filtration angle ( angle of the iris ) the angle between the iris and cornea at the periphery of the anterior chamber of the eye, through which the aqueous humor readily permeates. (thefreedictionary.com)
  • the Q angle describes the relationship between the long axis of the femur, measured from the anterior superior ilac spine. (tabers.com)
  • The angle between the cornea and iris at the periphery of the anterior chamber of the eye. (tabers.com)
  • The angle formed at the anterior nasal spine by the intersection of lines drawn from the auricular point and the glabella. (tabers.com)
  • Lesions of the temporal bone and cerebellopontine angle present a diagnostic challenge because of the complex anatomy, multiplicity of lesions, and difficulty in imaging the dense bone of this area. (jamanetwork.com)
  • Maslan MJ, Latack JT, Kemink JL, Graham MD. Magnetic Resonance Imaging of Temporal Bone and Cerebellopontine Angle Lesions. (jamanetwork.com)
  • MR imaging demonstrated a mass of homogeneous low signal intensity in the left CP angle on T1-weighted images with no enhancement with gadolinium, and of relatively homogeneous high signal intensity on T2-weighted images. (ajnr.org)
  • B, Precontrast T1-weighted axial MR image (366/11/3) shows a homogeneous low signal intensity mass in left CP angle compressing the brain stem. (ajnr.org)
  • Glioblastoma presenting as an extraaxial mass of cerebellopontine angle (CPA) is very rare in adults. (jkns.or.kr)
  • Initial magnetic resonance imaging scans with axial enhanced T1-weighted (A) and T2-weighted (B) images, showing the mass in the left cere-bellopontine angle with broad base to the petrous bone (arrows). (jkns.or.kr)
  • Computed tomography revealed a high-density mass in the left CP angle with little enhancement after intravenous administration of contrast media. (elsevier.com)