Parkinsonism in the course of HTLV-I-associated myelopathy.

Parkinsonian syndromes may represent a complication of viral infection. Human T cell lymphotropic virus I (HTLV-I) is a cause of a chronic myelopathy in which encephalic involvement has been also found. We report on the case of a 60-year-old man with HTLV-I-associated myelopathy, complicated with bradykinesia, resting tremor, and cogwheel rigidity. These findings suggest that parkinsonian features may represent a neurological disorder associated with HTLV-I infection.