Abstract
Oligodendroglioma is a rare brain tumor. Although it commonly originates in the cerebral hemisphere in adults, in the pediatric population, the location of oligodendroglioma varies and includes the cerebellum, midbrain, and spinal cord. The MRI characteristic of oligodendroglioma is also different between adults and pediatrics. Oligodendroglioma of >3 cm in pediatrics is associated with a poorer prognosis. Surgery and radiotherapy are the modality of choice for such patients. In this case, we present a 12-year-old girl with huge oligodendroglioma (WHO grade II). MRI showed an isointense-inhomogeneous signal on T1W1 and isointense with some region of hyperintense inhomogeneous on T2W1. After a 26-times-radiotherapy regimen, the patient was followed up for MRI evaluation and which revealed a marked reduction of tumor volume. The patient also reported no symptoms and overall clinical improvement.