Omental Tissue Autograft in Human Recurrent Glioblastoma Multiforme (rGBM)

This study is testing whether placing a small piece of omental tissue (fat from inside the abdomen) into the brain at the time of surgery helps improve outcomes for people with recurrent glioblastoma (GBM), a highly aggressive brain tumor that has grown back after previous treatment. **You may be eligible if...** - You are 18 or older - You are having surgery to remove a recurrent glioblastoma - You are in reasonable health (Karnofsky score 70% or above) - Surgeons expect to remove at least 80% of the visible tumor - Your blood counts, liver function, and bilirubin are within acceptable limits - You are expected to survive at least 6 months **You may NOT be eligible if...** - You have had too many prior surgeries or treatments that make this procedure unsafe - Your overall health does not support surgery - You are unable to undergo MRI Talk to your doctor to see if this trial is right for you.