FIG 3. Low-grade oligodendroglioma in a 42-year-old man.

A, Axial T2-weighted (4750/105) fast SE image shows a high-signal-intensity mass in the right frontal lobe.

B, Axial T1-weighted (466/14) image shows that the mass is isointense to slightly hyperintense.

C, Axial contrast-enhanced T1-weighted (466/14) image shows partial tumor contrast enhancement. The contrast enhancement ratio is 40.88.

D, Photomicrograph of the specimen (hematoxylin-eosin stain; original magnification, x40) shows even cellularity and little nuclear pleomorphism and hyperchromasia. No mitosis or necrosis is present. There is no increased neovascularity.