Drug Response Testing and Repurposing Using Glioblastoma Organoid

This study is using laboratory-grown mini tumor models (called organoids) made from a patient's own glioblastoma — the most aggressive type of brain tumor — to test which drugs work best for that individual. The aim is to find existing approved drugs that could be repurposed to treat each patient's specific tumor. **You may be eligible if...** - You have been diagnosed with glioblastoma (primary or recurrent) - You received standard treatment including surgery and temozolomide-based chemoradiation - Sufficient tumor tissue was collected during your surgery for organoid growth **You may NOT be eligible if...** - You did not undergo concurrent chemoradiation therapy following surgery - Post-treatment MRI was not performed - You prefer not to participate Talk to your doctor to see if this trial is right for you.