Hemichorea hemiballism syndrome: the first presentation of type 2 diabetes mellitus as a rare cause of chorea.

Hemichorea-hemiballism (HCHB) syndrome, which is most commonly related to non-ketotic hyperglycemia, is a rare type of chorea. Here, we present an unusual case of HCHB syndrome who was not a known case of diabetes. This case highlights the importance of recognising underlying non-ketotic hyperglycemia, as control of hyperglycemia is helpful in the quick relief of symptoms.