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  2. Optic nerve sheath meningioma - Wikipedia

    en.wikipedia.org/wiki/Optic_nerve_sheath_meningioma

    Optic nerve sheath meningiomas (ONSM) are rare benign tumors of the optic nerve. 60–70% of cases occur in middle age females, and is more common in older adults (mean age 44.7 years). It is also seen in children, but this is rare. The tumors grow from cells that surround the optic nerve, and as the tumor grows, it compresses the optic nerve.

  3. Brain tumor - Wikipedia

    en.wikipedia.org/wiki/Brain_tumor

    This is an accepted version of this page This is the latest accepted revision, reviewed on 3 February 2025. Neoplasm in the brain Medical condition Brain tumor Other names Intracranial neoplasm, brain tumour, brain cancer Brain metastasis in the right cerebral hemisphere from lung cancer, shown on magnetic resonance imaging Specialty Neurosurgery, neuro-oncology Symptoms Vary depending on the ...

  4. List of people with brain tumors - Wikipedia

    en.wikipedia.org/wiki/List_of_people_with_brain...

    In the United States in 2000, survivors of benign primary brain tumors outnumbered those who had cancerous primary brain tumors by approximately 4:1. Metastatic brain cancer is over six times more common than primary brain cancer, as it occurs in about 10–30% of all people with cancer. [1] This is a list of notable people who have had a ...

  5. Nervous system neoplasm - Wikipedia

    en.wikipedia.org/wiki/Nervous_system_neoplasm

    Nervous system neoplasms include various types of brain and spinal cord tumors, such as gliomas, and meningiomas (of the CNS), and schwannomas (of the PNS) and can be either benign or malignant. [1] In the CNS a tumor may be a secondary malignant tumor having metastasised (spread from a primary site in the body). Treatment and prognosis depend ...

  6. WHO classification of tumours of the central nervous system

    en.wikipedia.org/wiki/WHO_classification_of...

    The 5th WHO classification delineates distinct types of tumors, some of them being further divided into subtypes, rendering the former terms entity and variant obsolete. When molecular diagnostics are not complete enough to allow precise classification, diagnosis should be designated by appending not otherwise specified (NOS).

  7. Anaplastic astrocytoma - Wikipedia

    en.wikipedia.org/wiki/Anaplastic_astrocytoma

    It is important to note that prognosis across age groups is different especially during the first three years post-diagnosis. When the elderly population is compared with young adults, the excess hazard ratio (a hazard ratio that is corrected for differences in mortality across age groups) decreases from 10.15 to 1.85 at 1 to 3 years, meaning ...

  8. Glioma - Wikipedia

    en.wikipedia.org/wiki/Glioma

    A glioma is a type of primary tumor that starts in the glial cells of the brain or spinal cord.They are cancerous but some are extremely slow to develop. [2] [3] Gliomas comprise about 30 percent of all brain tumors and central nervous system tumours, and 80 percent of all malignant brain tumours.

  9. Primary central nervous system lymphoma - Wikipedia

    en.wikipedia.org/wiki/Primary_central_nervous...

    Brain biopsy. HPS stain. The current standard for diagnosis typically includes positive CSF cytology, vitreous biopsy, or brain/leptomeningeal biopsy. [10] Histopathological confirmation is essential for definitive diagnosis. [11] MRI or contrast enhanced CT classically shows multiple ring-enhancing lesions in the deep white matter.

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