Male, 35 years old, with history of grade 2 oligodendroglioma status post partial resection. A heterogeneous tumor is evident within the left frontal lobe spanning from the cortical surface to the lateral ventricular margin. Abnormal signal also spreads into the genu of the corpus callosum and along the margin of the left caudate nucleus.Evidence of interval partial tumor resection is seen with a small resection cavity in the central portion of the tumor. The margins of this cavity demonstrate a thin rim of discrete enhancement. Anterior to the cavity, there is a blush of mild enhancement within the tumor which appears similar to prior exams. Apart from the resection cavity, the overall size and morphology of the lesion have not significantly changed from prior exams.Mass effect from the lesion results in partial effacement of the left frontal horn and a very slight midline shift to the right. No other parenchymal lesions are seen. No other abnormal intracranial enhancement is detected. The ventricular system is otherwise normal in size and morphology.
Findings are seen compatible with partial resection of a left frontal lobe tumor. Apart from the resection cavity, there has been no significant interval change in the size of the lesion when compared to prior exams.