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Two siblings with homocystinuria presenting with dystonia and parkinsonism

Movement disorders such as dystonia, chorea or tremor are rarely encountered in patients with homocystinuria. We present 2 siblings with laboratory‐confirmed homocystinuria, one with severe generalized dystonia and the other with mild parkinsonism. The movement disorders in our patients appeared in the second and first decades, respectively. © 2004 Movement Disorder Society