Standard Chemotherapy vs. Chemotherapy Guided by Cancer Stem Cell Test in Recurrent Glioblastoma

This study is designed as a parallel group randomized controlled clinical trial to determine if recurrent Glioblastoma (GBM) patients treated with drugs predicted by the ChemoID assay will have better outcomes than patients treated with standard-of-care control therapy chosen by the Physician. Upon obtaining informed consent, all eligible participants affected by recurrent GBM will have a tumor biopsy to undergo ChemoID drug response testing with multiple FDA-approved chemotherapeutic agents. Eligible participants will be randomized to a standard treatment arm with control treatment (chemotherapy chosen by the Physician from a provided list), or to a study arm of FDA-approved drugs selected by the ChemoID drug response assay.