Case of viral pontocerebellitis due to HSV-2 in an infant

6-month-old with viral pontocerebellitis due to HSV-2 confirmed by cerebrospinal fluid PCR. Transverse axial T2-weighted images (A to C) show foci of abnormal T2 hyperintensity (arrows) in left basis pontis and bilateral, left greater than right, cerebellar hemispheres. These hyperintense foci are even more conspicuous as bright signal on diffusion-weighted MR images (D to F).