Fast Five Quiz: Tardive Dyskinesia Differential Diagnosis

Christoph U. Correll, MD


March 17, 2023

Postural instability frequently occurs in patients with Huntington disease, but it is uncommon in patients with antidopaminergic-induced TD.

Unlike TD, Huntington disease appears with chorea (derived from the Greek word meaning to dance) in the face and the proximal extremities. The term "chorea" implies a distinctive dancelike gait. Initially, mild chorea may pass for fidgetiness. Severe chorea may appear as uncontrollable flailing of the extremities (ie, ballism), which interferes with function.

Learn more about the differential diagnosis of TD.


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