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Skull Base NeoplasmsSkull BaseNeoplasms, Glandular and EpithelialSkullBrenner TumorCystadenomaLinitis PlasticaThymus NeoplasmsSkull NeoplasmsMesocolonCystadenocarcinomaThymomaChordomaCarcinomaNeoplasms, Multiple PrimaryAdenomaSkull FracturesImmunohistochemistryOvarian NeoplasmsAdenocarcinomaCerebrospinal Fluid RhinorrheaKeratinsMeningiomaSurgical EquipmentPancreatic NeoplasmsTumor Markers, BiologicalSphenoid SinusMeningeal NeoplasmsCraniotomyNeoplasmsBase PairingSphenoid BoneBase SequenceCranial Fossa, PosteriorTomography, X-Ray ComputedEthmoid BoneNeoplasms, Cystic, Mucinous, and SerousCranial Nerve DiseasesParanasal Sinus NeoplasmsEndoscopyPetrous BoneNeuronavigationOtorhinolaryngologic Surgical ProceduresCranial Nerve NeoplasmsNose NeoplasmsNasal CavitySkin NeoplasmsTemporal BoneMagnetic Resonance ImagingNeurosurgical ProceduresParanasal SinusesHemangiopericytoma

IntracranialTumorsMalignantGermMalignanciesBoneIncidencePrimaryDiagnosisSpinalStructuresCellsBonesCommonContentSpecificCaseMajorityViewPartsBrainHeadGlandular epithelialMesenchymalMalignantBenignSurgical excisionAdenocarcinomaDifferential DiagnosisNasalMeningiomaCancerCommonlyFrequencyMeningiomasClinicalProbableAbnormalitiesLateralTissueCasesLocations

Intracranial3

• The skull base can be divided arbitrarily into anatomic subsites corresponding to the major intracranial compartments as follows: (1) anterior skull base (anterior cranial fossa), (2) middle skull base (middle cranial fossa), (3) posterior skull base (posterior cranial fossa), and (4) central skull base (brainstem). (medscape.com)
• Plain skull radiograph may reveal hyperostosis and increased vascular markings of the skull, as well as intracranial calcifications. (medscape.com)
• Meningiomas account for approximately 20% of all primary intracranial neoplasms. (medscape.com)

Tumors13

• Benign tumors of the skull base include true neoplasms, inflammatory masses, cysts, and developmental anomalies occurring at the osseous interface between the brain and the underlying structures of the head and neck. (medscape.com)
• Over the past decades, advances in anesthesia, improvements in surgical technology, and refinements in reconstructive modalities have enabled surgical removal of cranial base tumors that were previously associated with unacceptable morbidity. (medscape.com)
• A variety of benign tumors occur along the cranial base. (medscape.com)
• Because of the complexities of the anatomic region and the relatively low incidence, patients with skull base tumors are best managed by an experienced multidisciplinary team. (medscape.com)
• The treatment of choice for the vast majority of benign skull base tumors is surgical excision. (medscape.com)
• As a whole, tumors of the skull base are uncommon entities, and the majority of them are malignant. (medscape.com)
• Benign skull base tumors can be classified into the pathogenetic and histologic groups listed below. (medscape.com)
• While most tumors metastatic to the serous membranes are of epithelial origin, cytologists should be aware that non-epithelial neoplasms can also cause malignant effusions including sarcomas, melanomas, germ cell tumors, and, more rarely, brain tumors. (cytojournal.com)
• Most tumors metastatic to the serous membranes are of epithelial origin. (cytojournal.com)
• Common non-epithelial neoplasms that may cause malignant effusions include malignant melanoma, sarcomas, and other neoplasms including germ cell tumors [ Figure 1 ]. (cytojournal.com)
• Other rare non-epithelial malignancies that may be encountered in effusion cytology include neuroblastoma, Wilms tumor, and metastatic brain tumors. (cytojournal.com)
• On plain head CT scans, meningiomas are usually dural-based tumors that are isoattenuating to slightly hyperattenuating. (medscape.com)
• These skull base tumors are best diagnosed by MRI and CT scans which will clearly show the extent of tumor and bony destruction. (indiahealthtour.com)

Malignant4

• As malignant cells have a tendency to round up in body fluids these non-epithelial neoplasms can therefore mimic reactive mesothelial cells and metastatic adenocarcinoma. (cytojournal.com)
• 4 Malignant effusions caused by non-epithelial neoplasms are more frequently encountered in children than in adults. (cytojournal.com)
• It is the most common primary malignant bone neoplasm in adults. (radiopaedia.org)
• Head and neck cancer (HNC) is a heterogeneous group of malignant neoplasms, and its classification is a challenge. (eurekaselect.com)

Germ1

• and human chorionic gonadotropin (hCG), seen in choriocarcinoma testicular germ cell neoplasms. (doctorlib.info)

Malignancies2

• Diagnosing non-epithelial malignancies in effusion specimens based entirely upon their cytomorphologic features is difficult because these neoplasms often exhibit considerable morphological overlap and their cytomorphology can differ from the original tumor. (cytojournal.com)
• It accounts for 1% of all malignancies and 10-15% of all hematological neoplasms 12,14 . (radiopaedia.org)

Bone3

• however, they constitute 2-4% of all primary bone neoplasms. (spinalsurgerynews.com)
• Multiple myeloma (MM) , also known as plasma cell myeloma , is a multifocal proliferation of plasma cells based in the bone marrow . (radiopaedia.org)
• Bone of the base of the skull Maxilla bone 1. (slideshare.net)

Incidence1

• Accordingly, no accurate data regarding the incidence of benign skull base neoplasms are available. (medscape.com)

Primary1

• Based on the primary site, most literature comprehends five types of HNCs: laryngeal, pharyngeal, oral cavity, nasal cavity, and salivary gland cancer. (eurekaselect.com)

Diagnosis2

• In all cases of intranasal or pharyngeal neoplasm the diagnosis of meningioma, craniopharyngeoma and glioma should be considered as differential diagnosis to optimize the surgical procedure. (biomedcentral.com)
• The true diagnosis is based mainly on histopathological examination. (biomedcentral.com)

Spinal1

• The neural tube of the embryo develops into the brain, spinal cord , spinal column , and the skull. (encyclopedia.com)

Structures1

• MRI has evolved into the single most useful imaging study of the skull base and provides highly accurate representation of soft tissue structures. (medscape.com)

Cells1

• The problem of classifying meningioma is that arachnoidal cells may express both mesenchymal and epithelial characteristics. (medscape.com)

Bones1

• Learning objectives  Know the different bones of the skull and face? (slideshare.net)

Common1

• More than 90% of HCNs are of epithelial origin, making squamous cell carcinoma the most common histological type. (eurekaselect.com)

Content1

• Bentham is offering subject-based scholarly content collections which are tailored to meet specific research needs. (eurekaselect.com)

Specific1

• Undoubtedly, advances in molecular biology will allow scientists to determine the exact genomic aberration responsible for each specific neoplasm. (medscape.com)

Case1

• See Brain Lesions: 9 Cases to Test Your Management Skills , a Critical Images slideshow, to review cases including meningiomas, glioblastomas and craniopharyngiomas, and to determine the best treatment options based on the case history and the associated images. (medscape.com)

Majority1

• They represent the majority of paranasal neoplasms. (lookformedical.com)

View1

• Internal anatomy of the skull base, lateral view, and base of the skull. (medscape.com)

Parts1

• Various surgical approaches have evolved to access the various parts of the skull base. (medscape.com)

Brain2

• The dura is opened, and the meningioma can be seen extending en plaque over the surface of the brain. (medscape.com)
• Meningiomas commonly are found at the surface of the brain, either over the convexity or at the skull base. (medscape.com)

Head1

• Operative procedures of the skull base are relatively recent developments within the field of head and neck surgery. (medscape.com)

Glandular epithelial2

• Acinic Cell Carcinoma A malignant glandular epithelial neoplasm consisting of secretory cells forming acinar patterns. (nih.gov)
• Malignant cells exhibit distinct features such as glandular epithelial, or tubular morphology. (nih.gov)

Mesenchymal3

• The problem of classifying meningioma is that arachnoidal cells may express both mesenchymal and epithelial characteristics. (medscape.com)
• The epithelial neoplasms have occurred in older dogs compared to those of other histogenic origins (mesenchymal and other origins/round cells). (bvsalud.org)
• The frequency was 48% of epithelial neoplasms, 32% of mesenchymal neoplasms, and 10% of neoplasms with other origins and round cells. (bvsalud.org)

Malignant4

• Cancer neoplasms constituted 40% of malignant ASBOT. (ozhurnal.com)
• Clinical, CT and MRI features for various histomorphological types of benign and malignant neoplasms were described. (ozhurnal.com)
• We also determined frequencies of injury to various compartments of the intra- and extra-cranial surfaces of the skull base for benign and malignant processes. (ozhurnal.com)
• Benign ASBOT were found to be more commonly located in the lateral skull base, whereas malignant ASBOT were more commonly seen within the floor of the anterior cranial fossa. (ozhurnal.com)

Benign2

• Accordingly, no accurate data regarding the incidence of benign skull base neoplasms are available. (medscape.com)
• Code Preferred Term Synonyms Definition Neoplastic Status C7419 Acanthoma A benign skin neoplasm composed of epithelial cells. (nih.gov)

Surgical excision1

• What is the most probable clinical concern for this neoplasm after surgical excision? (cap.org)

Adenocarcinoma1

• The neoplasms most frequently observed, in decreasing order of frequency, were: adenocarcinoma (9/50), squamous cell carcinoma (9/50), transmissible venereal tumor (5/50), osteosarcoma (5/50), chondrosarcoma (4/50), and undifferentiated sarcoma (4/50). (bvsalud.org)

Differential Diagnosis1

• CAPNON may mimic more common vascular malformations or neoplasms and are often not considered in the differential diagnosis of calcified lesions. (ajnr.org)

Nasal1

• The main clinical signs were similar between the histogenetic categories, related to the involvement of the upper respiratory tract, sometimes accompanied by nervous signs (when there was brain invasion of nasal neoplasms or vice versa). (bvsalud.org)

Meningioma1

• The dura is opened, and the meningioma can be seen extending en plaque over the surface of the brain. (medscape.com)

Cancer2

• 13. EIF5A2 enhances stemness of epithelial ovarian cancer cells via a E2F1/ klf4 axis. (nih.gov)
• Lymphoma, one of the four major types of cancer, is a neoplasm (an abnormal growth that serves no purpose) of the lymph tissue. (cancertutor.com)

Commonly3

• Meningiomas commonly are found at the surface of the brain, either over the convexity or at the skull base. (medscape.com)
• Commonly, these are epithelial neoplasms (cancers). (ozhurnal.com)
• Bone is one of the most common anatomic sites for metastases, along with the lungs and liver, and metastases are the most commonly diagnosed neoplasms encountered in the skeleton. (basicmedicalkey.com)

Frequency1

• Through this study, it was possible to establish the frequency of these neoplasms in 20 years and their clinical, macroscopic, and histological characteristics. (bvsalud.org)

Meningiomas4

• The current trend is to separate unequivocal meningiomas from other less well-defined neoplasms. (medscape.com)
• If the meningiomas are located in the skull base, they may occlude the cerebral arteries and present as strokes or transient ischemic attacks . (symptoma.com)
• Those developing in bone, typically the skull, are designated intraosseous meningiomas. (cap.org)
• Tumor cells are strongly positive for epithelial membrane antigen ( Image F ) and show nuclear positivity for progesterone receptor ( Image G ). A possible pathogenetic role for progesterone has been postulated in numerous studies and may account for the higher incidence of meningiomas in women. (cap.org)

Clinical1

• This study aimed to quantify nasosinusal neoplasms diagnosed in dogs in 20 years (2000-2019) and characterize the main clinical, macroscopic, and histological aspects of these neoplasms. (bvsalud.org)

Probable1

• The prognosis Prognosis A prediction of the probable outcome of a disease based on a individual's condition and the usual course of the disease as seen in similar situations. (lecturio.com)

Abnormalities1

• 8/31/2009) TOTAL 2010 NEW DESCRIPTORS = 422 MH - Aberrometry UI - D057128 MN - E1.370.380.74 MS - The use of an aberrometer to measure eye tissue imperfections or abnormalities based on the way light passes through the eye which affects the ability of the eye to focus properly. (nih.gov)

Lateral1

• Internal anatomy of the skull base, lateral view, and base of the skull. (medscape.com)

Tissue3

• MRI has evolved into the single most useful imaging study of the skull base and provides highly accurate representation of soft tissue structures. (medscape.com)
• Lymphoma - neoplasm of lymph tissue that is most predominant in cats. (cancertutor.com)
• It is based upon probe measurement of periodontal pockets and on gingival tissue status. (lookformedical.com)

Cases1

• These cases are reported with chief complaint of pain and irritation in a localized area and diagnosed clinically based on the presence of the maggots. (ijhnp.org)

Locations1

• During this period, 49 dogs were affected by neoplasms in these regions, totaling 50 neoplasms (one dog had two neoplasms of different locations and histogenetic origins). (bvsalud.org)