• 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)
  • Therefore, the TNM (Tumor size, Nodal involvement, Metastases) system used for most non-CNS tumors is not commonly employed in the evaluation of CNS neoplasms. (medscape.com)
  • Because neoplasms in the CNS have widely varying features, clinical courses, and prognoses, a robust and reliable grading system is essential for the proper evaluation of CNS tumors. (medscape.com)
  • A spinal neoplasm is anyone of many tumor types that are similar to intracranial tumors and involve the spinal cord or its roots. (health-care-clinic.org)
  • Extramedullary tumors may be intradural (meningiomas and schwannomas), which account for 60% of all primary spinal cord neoplasms, or extradural (metastatic tumors from breasts, lungs, prostate, leukemia, or lymphomas), which account for 25% of these neoplasms. (health-care-clinic.org)
  • [ 1 ] Meningiomas are also the most common extra-axial tumors in the brain and the most frequently occurring tumors of mesodermal or meningeal origin. (medscape.com)
  • Flat tumors, termed en plaque, infiltrate the dura and grow as a thin carpet or sheet of tumor along the convexity dura, falx, or tentorium. (medscape.com)
  • Meningeal tumors were the most common histologic group among all tumors (ASR, 8.32). (e-crt.org)
  • Solitary fibrous tumor (SFT), also previously known as hemangiopericytoma, is a rare mesenchymal neoplasm of fibroblastic origin, accounting for less than 2% of all soft tissue tumors [1] . (axisneuromonitoring.com)
  • Due to this change, tumor grades more accurately reflect the cellular behavior and subsequent clinical course of each neoplasm. (medscape.com)
  • Meningeal irritation due to spread of tumor in the subarachnoid space may lead to neck stiffness and head tilt. (medscape.com)
  • We report the MRI and CT findings of an intracranial meningeal melanocytoma (IMM) arising from Meckel's cave and review the imaging characteristics of IMM. (tmu.edu.tw)
  • Axial T2 weighted images (B), T1 weighted images before (C) and after contrast administration (E, F) show a contrast enhancing soft tissue mass being slightly inhomogeneous in the left frontal sinus without any intracranial meningeal enhancement. (biomedcentral.com)
  • However, this still cannot provide a distinction between IMM and malignant meningeal melanoma. (tmu.edu.tw)
  • Malignant plasma cells in meningeal MM out of 2000 patients with bone marrow produce an immunoglobulin, MM, was reported was by Schluterman et al. (who.int)
  • Eosinophilic meningitis (EM) is a rare clinical entity characterized by meningeal inflammation and eosinophilic pleocytosis in the cerebrospinal fluid (CSF) ( 1 - 7 ). (cdc.gov)
  • Meningeal melanomatosis: a challenge for timely diagnosis. (nih.gov)
  • A meningeal melanoma with secondary diffuse meningeal spread. (nih.gov)
  • Primary diffuse meningeal melanomatosis - a rare form of meningeal melanoma: case report. (nih.gov)
  • however, involvement of MM in the cerebrospinal fluid and lepto meningeal infiltration is considered rare. (who.int)
  • A new experimental model of meningeal leukemia. (jax.org)
  • Treatment of meningeal relapse in childhood acute lymphoblastic leukemia. (mcw.edu)
  • Acute myeloid leukemia has a number of subtypes and precursor neoplasms that are distinguished from each other by morphology, immunophenotype, cytochemistry, and genetic abnormalities (see also The 2016 World Health Organization [WHO] Classification of myeloid neoplasms ) all of which have important implications for prognosis and treatment. (msdmanuals.com)
  • Syphilitic infection of the nervous system results in the most chronic, insidious meningeal inflammatory process known. (medscape.com)
  • The radiologic appearance varies and does not permit distinction from neoplasms or other granulomatous diseases. (neurology.org)
  • Abnormal growths of tissue that follow a previous neoplasm but are not metastases of the latter. (lookformedical.com)
  • Primary spinal neoplasms originate in the meningeal coverings, the parenchyma of the cord or its roots, the intraspinal vasculature, or the vertebrae. (health-care-clinic.org)
  • Transfer of a neoplasm from its primary site to lymph nodes or to distant parts of the body by way of the lymphatic system. (lookformedical.com)
  • Primary Diffuse Meningeal Melanomatosis. (nih.gov)
  • Brain Atrophy Associated with Primary Diffuse Meningeal Melanomatosis. (nih.gov)
  • Coexistent meningeal or hypothalamic involvement is often present, but extracranial sarcoidosis may be absent. (neurology.org)
  • The second neoplasm may have the same or different histological type and can occur in the same or different organs as the previous neoplasm but in all cases arises from an independent oncogenic event. (lookformedical.com)
  • Various theories have been proposed, with the meningeal trigeminal branches' origin being the most probable. (archivosdeneurociencias.org)
  • The development of the second neoplasm may or may not be related to the treatment for the previous neoplasm since genetic risk or predisposing factors may actually be the cause. (lookformedical.com)
  • Long-term survival with acceptable toxicity is possible following aggressive, prompt treatment of meningeal relapse occurring after prophylactic cranial irradiation. (mcw.edu)
  • Meningeal melanomatosis following discontinuation of dabrafenib: implications for the maintenance of long-term complete remission. (nih.gov)
  • Methods which attempt to express in replicable terms the extent of the neoplasm in the patient. (lookformedical.com)
  • Benign and malignant neoplastic processes that arise from or secondarily involve the meningeal coverings of the brain and spinal cord . (online-medical-dictionary.org)
  • Several rare neoplasms including benign astrocytoma, malignant glioma, malignant medulloblastoma benign meningeal granular cell tumor, and meningeal sarcoma were observed in the brain of exposed female rats. (nih.gov)
  • Salivary gland neoplasms are rare with males being more likely to have malignant salivary gland tumors as compared to females. (atpjournal.org)
  • The WHO classification of 2007 described four entities: diffuse melanocytosis, melanocytoma, malignant melanoma and meningeal melanomatosis. (kl.ac.at)
  • Meningeal melanocytosis is a benign proliferation of melanocytes with a risk of malignant transformation and is often associated with neurocutaneos melanosis. (kl.ac.at)
  • Malignant plasma cells in meningeal MM out of 2000 patients with bone marrow produce an immunoglobulin, MM, was reported was by Schluterman et al. (who.int)
  • Therefore, the TNM (Tumor size, Nodal involvement, Metastases) system used for most non-CNS tumors is not commonly employed in the evaluation of CNS neoplasms. (medscape.com)
  • Because neoplasms in the CNS have widely varying features, clinical courses, and prognoses, a robust and reliable grading system is essential for the proper evaluation of CNS tumors. (medscape.com)
  • Lepto-meningeal metastases from solid tumors are of increasing importance in neuro-oncology, because of the increasing frequency and the severe neurologic disabiliry it causes. (eur.nl)
  • The more common metastatic brain tumors may take origin from virtually any primary neoplasm, but the most frequent are lung, breast, melanoma, kidney, and colon. (basicmedicalkey.com)
  • The primary tumors of the central nervous system are classified as gliomas and nonglial neoplasms, including neuronal tumors and meningiomas. (basicmedicalkey.com)
  • Due to this change, tumor grades more accurately reflect the cellular behavior and subsequent clinical course of each neoplasm. (medscape.com)
  • 36. Analysis of the inflammatory tumor microenvironment in meningeal neoplasms. (nih.gov)
  • Meningeal irritation due to spread of tumor in the subarachnoid space may lead to neck stiffness and head tilt. (medscape.com)
  • This is a retrospective study on 201 cases of cervical neoplasm comprising of 129 cervical intraepithelial neoplasia (CIN) and 72 squamous cell carcinoma (SCC). (ijpmonline.org)
  • In addition, the finding of mammary gland carcinoma in exposed male rats was noteworthy because this neoplasm rarely occurs in control male rats. (nih.gov)
  • Adenoid cystic carcinoma (ACC) is a rare epithelial neoplasm, that may affect the salivary glands. (annexpublishers.com)
  • Meningiomas are neoplasms originating from the meningeal tissue covering the brain and spinal cord. (medscape.com)
  • M eningiomas are neoplasms that are derived from the arachnoid cap (meningothelial cells) of the brain and spinal cord meningeal coverings. (iranpath.org)
  • Primary meningeal diseases, such as the granulomatous meningitides or meningeal carcinomatosis, may on occasion cause bleeding into the subarachnoid space. (jamanetwork.com)
  • Meningeal carcinomatosis was also not considered due to the slow progression, though CSF cytology was not investigated. (biomedcentral.com)
  • Salivary gland neoplasms constituted 2.1% of all neoplastic lesions seen in the study period. (atpjournal.org)
  • The presence of neural tissue, meningeal tissue, bone, and cartilage makes any of these tissue types a possible nidus for neoplastic change. (medscape.com)
  • [ 3 ] Radiofrequency electromagnetic fields emitted by mobile telephones has been suggested as a possible risk factor for meningiomas, mainly based on the analogy with ionizing radiation and the proximity of the meningeal tissue to the handset, i.e. the source of the radiofrequency field. (medscape.com)
  • MRI of the brain showed a meningeal contrast-enhancement in the brainstem area. (kl.ac.at)
  • Neuroimaging in patients infected with Covid-19 revealed the apparition of severe brain pathologies, such as acute perfusion deficits and white matter abnormalities, meningeal enhancement, basal ganglia lesions, intracranial hemorrhage, encephalitis, cerebral venous thrombosis, encephalopathy, and stroke [1,2]. (annexpublishers.com)
  • Salivary gland neoplasms are rare and can pose complex diagnostic questions and management challenges to the Histopathologist and Surgeon respectively. (atpjournal.org)
  • This study aims to determine the expression of p16 INK4A and survivin as possible predictive biomarkers in cervical squamous neoplasm. (ijpmonline.org)
  • however, involvement of MM in the cerebrospinal fluid and lepto-meningeal infiltration is considered rare. (who.int)
  • Procesos neoplásicos benignos y malignos originados en las meninges o que secundariamente afectan a las cubiertas meníngeas del cerebro y de la médula espinal. (bvsalud.org)
  • The neoplasm can also invade adjacent brainstem structures, including the cardiorespiratory centers of the fourth ventricular floor. (medscape.com)
  • Manifestations of meningeal irritation: Neck pain or stiffness, photophobia, sonophobia, or other hyperesthesia may be noted with SAH. (medscape.com)
  • We present four cases of subarachnoid hemorrhage, uncomplicated by infection or neoplasm, in which CSF glucose value was markedly decreased. (jamanetwork.com)
  • Meningeal leukemic involvement is rarely a presenting feature of CMML. (longdom.org)
  • Variations in the brain's reaction at different locations and similarities in the brain's reaction to certain agents and in the appearances of aggressive neoplasms all require correlation of medical history, neuroimaging, and results of microbiologic analysis. (medscape.com)
  • Epidural hematoma results from rupture of a meningeal artery and follows a hyperacute course, whereas subdural hematoma results from rupture of bridging veins and follows an acute or a chronic course, depending on the severity of the injury. (basicmedicalkey.com)