Magnetic resonance imaging of postinfectious acute cerebellitis in a child

7-year-old with tick-borne cerebellitis. Transverse axial T2-weighted FLAIR images (A, B) demonstrate small foci of T2 hyperintensity in the superomedial cerebellar hemispheres (thick arrows) and both middle cerebellar peduncles (arrowheads). Corresponding postcontrast T1-weighted axial images (C, D) show enhancement associated with the T2-hyperintense lesions and faint leptomeningeal enhancement in the cerebellar folia (arrows).