Fig. 2.
Preoperative magnetic resonance imaging. (A-C) Axial images of T1WI, FLAIR, and T2W (A: T1WI; B: FLAIR; and C: T2W) show a mass adjacent to the right cerebellum. The lesion appears isointense on T1WI and T2W/FLAIR compared to cortical gray matter. Note the flow-void sign in the tumor (indicated by arrow). (D, E) Diffusion-weighted imaging and apparent diffusion coefficient (ADC) indicate that tumor (arrow) was strongly restricted diffusion, with the minimum ADC on the ADC map being 0.45 × 10−3 mm2/s. (F) Contrast-enhanced T1WI shows homogeneous and vivid enhancement of the tumor (arrow) without the dural tail sign.