Adult oligodendrogliomas, also known as adult oligodendroglioma tumors, are a type of brain tumor that predominantly affects adults. These tumors arise from the oligodendrocytes, a type of cell that produces myelin in the brain. Although adult oligodendrogliomas are relatively rare, they can be highly aggressive and require prompt medical attention. Synonyms for adult oligodendrogliomas include adult oligodendroglioma tumors, oligodendroglial tumors in adults, and adult glioma of oligodendroglial origin. These terms all refer to the same condition, characterised by the growth of abnormal cells in the brain that can impact various neurological functions. Early diagnosis and intervention remain vital for successful management of adult oligodendrogliomas.