During this study, Dr. Nicholas and his research team will collect information about you for the purposes of this research. This includes name, address, dates (i.e., date of birth, date of consent), telephone number, and medical record number. Slides of your tumor tissue that were used to diagnose your GBM will be sent to a pathologist to confirm the diagnosis of GBM. After this review has been completed your slides will be returned to the hospital that provided them. Preserved samples of your tumor will also be sent for a test to determine how effective the temozolomide might be in your case. Any remaining tissue will be returned to the hospital that provided it.