Figure 1.

MRI changes in the left corpus striatum related to hemichorea hyperglycaemia. Top row: initial MRI head shows abnormal hyperintensity in the left caudate head and left putamen on axial and coronal T1W MRI (a) and (b). Asymmetric low signal was noted along the lateral margin of the left putamen on SWI (c). On NECT head (d) there is corresponding increased attenuation in the left corpus striatum. Bottom row: MRI head performed five months later shows volume loss of the entire left corpus striatum, cystic foci of malacic change in the posterolateral putamen along with partial resolution of the hyperintensity on axial and coronal T1W MRI (e) and (f). There was progression in extent and degree of hypointensity within the left corpus striatum on SWI (g) with corresponding hyperintensity on filtered phase SWI (h).