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Non-ketotic hyperglycemic hemichorea

Case contributed by Chee Kok Yoon
Diagnosis almost certain

Presentation

Acute onset of hyperglycemia in the context of undiagnosed diabetes mellitus. Presented with severe chorea movements of all 4 limbs, right worse than left. Slight improvement of chorea after 3 months of symptom onset.

Patient Data

Age: 20 years
Gender: Female

High T1 and low T2/FLAIR signal are seen in the caudate and lentiform nucleus. 

Case Discussion

Non-ketotic hyperglycemic hemichorea (NHH) is rare, and is one of the causes of T1 bright basal ganglia. 

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