T1 sagittal pre gad T1 coronal post gad T2 axial

Diagnosis: Grade 1 oligodendroglioma.

Oligodendrogliomas represent up to 10% of all gliomas. They are rare in children and usually present in early middle age with seizures. The frontal lobe is the most common location and the cerebral cortex is often involved. Most are slow growing and usually demonstrate some enhancement. Calcification and cysts are common while hemorrhage and necrosis are unusual. This is also a good appearance for dysembryoplastic neuroepithelial tumor. DNET typically produces thickening of the cortex, often in the temporal lobe. Cystic changes as well as calcification and satellite lesions may also be seen. Cortical dysplasia is a possibility in this case; however, the focal region of low signal which is probably a cyst is atypical. Ganglioglioma tends to be cortically based and may contain cysts. They tend to be well circumscribed and usually show some enhancement. Astrocytoma is possible, but unlikely since this lesion is mostly cortical. Related Cases

Cortical Dysplasia Ganglioglioma Oligodendroglioma