Glioblastoma multiforme (GBM), also called glioblastoma, is a fast growing glioma that develops from star-shaped glial cells (astrocytes) that support nerve cells. GBM is classified as a grade IV astrocytoma. These are the most invasive type of glial tumors, rapidly growing, and commonly spread to nearby brain tissue.In adults, GBM occurs most often in the cerebral hemispheres, especially in the frontal and temporal lobes of the brain. GBM is a devastating brain cancer that typically results in death in the first 15 months after diagnosis.  Symptoms vary depending on the location of the brain tumor, but may include any of the following: Persistent headaches Double or blurred vision Vomiting Loss of appetite Changes in mood and personality Changes in ability to think and learn New seizures Speech difficulty of gradual onset All these symptoms will gradually worsen as the disease progresses. Thanks