MRI appearance of low-grade oligodendroglioma

Brain MRI in a 40-year-old male presenting with first-time generalized tonic-clonic seizure. Pathology confirmed a WHO grade 2 oligodendroglioma, IDH-mutant, 1p/19q-codeleted.
(Panel A) Axial FLAIR image showing a T2-hyperintense, expansile mass in the right frontal lobe.
(Panel B) Postcontrast axial T1-weighted image showing no appreciable contrast enhancement.