Fig. 1.

MRI findings.

Day 1 in hospital: (a) diffusion-weighted image (DWI), (c) T2-weighted image, and (d) fluid-attenuated inversion recovery image all show hyperintensity of the middle cerebellar peduncles (MCP), although the apparent diffusion coefficient map (b) shows no obvious abnormality. (e) Contrast-enhanced MRI shows low signal intensity in the MCP. (f) MR angiography shows no abnormality.

Day 17: (g) DWI and (h) T2-weighted image both show no lesion improvement.

Day 31: (i) DWI and (j) T2-weighted image both show lesion improvement.

Day 66: (k) DWI and (l) T2-weighted image both show lesion improvement.

DWI, diffusion-weighted image; MCP, middle cerebellar peduncles; MRI, magnetic resonance imaging.