Brain imaging of acute right hemichorea in a patient with poorly controlled type 2 diabetes mellitus

Brain imaging of a 45-year-old female with right hemichorea. (A) Plain computed tomography showed asymmetric hyperdensity in the left striatum (arrow). (B) T1-weighted magnetic resonance imaging showed high signaling in the corresponding region (arrow), without restricted diffusion. Diffusion-weighted imaging (C) and susceptibility-weighted imaging (D) confirmed no restricted diffusion (ie, acute infarct) and no hemorrhage in left striatal lesion (arrow).