Movement disorder with abnormal copper metabolism--a case report and review of the literature.

We describe a neurological disease, seen in the elder sister of identical twins, with dysarthria, involuntary movements, spastic gait, slightly low serum copper, borderline low to normal serum ceruloplasmin, normal urinary copper, and a high hair copper concentration. This neurological disorder appears to differ from others associated with abnormal copper metabolism such as Wilson's or Menkes' kinky hair disease.