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Glioma - Definition


A glioma is a tumor in the nervous system from the glial tissue, meaning the supportive tissue of the neurons. Gliomas can be benign, with different types designated by the names astrocytoma, ependymoma, and oligodendroglioma, or malignant in which case they are called glioblastoma. They occur primarily due to an intracranial pressure, a side-effect of the increased pressure generated in the inextensible skull involving headaches, vomiting, and eye disorders. Other symptoms are possible and depend on the location of the tumor and areas that are compressed by hypertension. A CT scan or MRI can detect the tumor. The treatment of glioma is mainly surgical: the tumor is removed; it may be accompanied by chemotherapy or radiotherapy if the tumor is cancerous.