In conclusion, although uncommon, chorea/ballism associated with
nonketotic hyperglycemia can be the first presenting sign of unknown diabetes mellitus or can occur after weeks or even months of poor glycemic control in diabetic patients. This case series is one of the largest published so far and adds valuable information about the clinical and neuroimaging features of this condition. While our results are comparable with published data, they further emphasize the role of adequate control of diabetes mellitus.
Figure 1. Computed tomography scan showing bilateral putaminal hyperdensities.
Figure 2. Magnetic resonance imaging showing unilateral hyperintensity in the putamen and caudate nucleus.