Abstract
TO THE EDITOR. —I read with interest the article by Scherokman et al,1 reporting on four cases of distal focal dystonia with a peripheral nervous system lesion, and I wish to describe a similar experience. REPORT OF A CASE. —A 48-year-old man presented with action-induced dystonia in the lower extremities, of one year's duration, and a five-year history of progressive numbness in the lower extremities, induced by walking and relieved by rest.On examination, he had good muscle bulk, tone, and strength, and no percussion myotonia. Attempted movement of the lower extremities induced a painful dystonic posturing of the feet in equinovarus position, resolving within 30/s. He had absent ankle jerks bilaterally and a mildly decreased pinprick and vibration sensation distally in the lower extremities, while position sense and light touch were intact.Complete blood cell count, erythrocyte sedimentation rate, levels of electrolytes, serum-copper, serum ceruloplasmin, and heavy metals