A 45-year-old poorly controlled type 2 diabetes mellitus Asian man presented with a three-day history of involuntary, jerky movements of his left upper and lower extremities. Laboratory results revealed plasma glucose of 615 mg/dL and normal osmolality with absent ketoacidosis. The diagnosis of hyperglycemic-induced hemi-ballism or diabetic striatopathy (DS) was confirmed by his imaging study. His abnormal movements had completely disappeared after hyperglycemic correction with insulin and intravenous fluid.

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