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Meningioma seen at autopsy, as a tumor of the dura mater extending into the cranial cavity, and can be detached from the bone along with the rest of the dura mater. Small tumors (e.g., < 2.0 cm) usually are incidental findings at autopsy without having caused symptoms. Larger tumors may cause symptoms, depending on the size and location.
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.
Once infectious causes ruled out, noninfectious causes should be investigated. These include a history of chemical irritation from recent surgery or chemicals injected into the subarachnoid space such as spinal anesthesia , other inflammatory or vascular conditions such as sarcoidosis or vasculitis , as well as Neoplastic conditions such as ...
Cancer diagnoses in adults under 50, while increasing, are still rare, and U.S. cancer deaths have been declining thanks to fewer people smoking tobacco and better treatment.
Some symptoms in adults are specific to the location of the tumor: Tumors in the cerebrum, which controls movement, may cause weakness or numbness to the body. This weakness is often limited to one side of the body. Tumors in the Broca's area of the cerebrum can cause speech difficulties. In extreme cases, the patient may have problems ...
Neurofibromatosis type II (also known as MISME syndrome – multiple inherited schwannomas, meningiomas, and ependymomas) is a genetic condition that may be inherited or may arise spontaneously, and causes benign tumors of the brain, spinal cord, and peripheral nerves. The types of tumors frequently associated with NF2 include vestibular ...
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