FIG 2. Anaplastic oligodendroglioma in a 47-year-old woman.

A, Axial T2-weighted (3200/96) fast SE image shows a high-signal-intensity mass that mainly involves the right frontal lobe and insula.

B, Axial T1-weighted (583/20) image shows that the mass is isointense to slightly hypointense.

C, Axial contrast-enhanced T1-weighted (583/20) image does not show obvious tumor contrast enhancement. The CER is 5.82.

D, Photomicrograph of the specimen (hematoxylin-eosin stain; original magnification x40) shows high cellularity, nuclear pleomorphism and hyperchromasia, and mitosis (arrow). There is no increased neovascularity.