Oligodendroglioma is a type of brain tumor that originates from oligodendrocytes, the cells responsible for producing the protective myelin sheath around nerve fibers. These tumors are typically found in the cerebral hemispheres and can vary in grade, with lower-grade tumors generally growing more slowly than higher-grade ones. Symptoms may include headaches, seizures, and changes in cognitive function, depending on the tumor's location. Diagnosis often involves imaging studies like MRI scans and may require a biopsy to confirm the presence of oligodendroglioma cells. Treatment options usually include surgery to remove the tumor, followed by radiation therapy and/or chemotherapy to manage any remaining cancerous cells.