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A mass with high T2 signal, and little if any contrast enhancement expands the right superior frontal gyrus. It prominently involves the cortex.
This patient went on to have surgery which confirmed the histological diagnosis of oligodendroglioma.
Note: This case predates the recent (2016) revision WHO classification of CNS tumours, and thus molecular markers (IDH mutation and 1p19q co-deletion) are not available. As such, this tumour would now be classified as an oligodendroglioma NOS.