Glioblastoma is a primary brain tumor arising from the glial tissue which nourishes and supports the brain. There are several different types of glial cells, astrocytes, oligodendrocytes and ependymal cells. Gliomas are the most commonly diagnosed of both benign and malignant primary brain tumors. Glial tumors account for 45-50% of all primary brain tumors. The most common gliomas are astrocytomas, ependymomas, oligodendrogliomas and tumors with mixtures of two or more of these cell types.
One of the many protocols for the treatment of glioblastoma is surgical intervention followed by chemotherapy. A post surgery MRI scan may indicate a radiosurgical boost or conventional radiation therapy. Also, a recurrence may be treated with Gamma Knife radiosurgery.