Sunitinib Tumor Levels in Patients Not on Enzyme-Inducing Anti-Epileptic Drugs Undergoing Debulking Surgery for Recurrent Glioblastoma

The purpose of this research study is to determine if sunitinib can get past the blood-brain barrier and into the brain tumor. Sunitinib has shown promising results in treating other cancers and works by blocking blood flow to tumors, which may prevent them from growing further. At the present time, there is no chemotherapy that can cure glioblastoma. The reason why chemotherapy is not fully effective is that many drugs cannot penetrate into brain tumors. This is due to the presence of the blood-brain barrier (BBB) which normally protects the brain from substances in the blood.