Fast Five Quiz: Tardive Dyskinesia Differential Diagnosis

Christoph U. Correll, MD


January 28, 2021

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

Unlike tardive dyskinesia, 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 dancelike distinctive 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 tardive dyskinesia.


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