Chorea mollis: long-term follow-up of an infantile case.

We describe the long-term follow-up of a patient affected by chorea mollis, a rare variant of Sydenham's chorea of which there are very few reports in the literature. Our patient, a previously healthy 8-year-old boy developed progressive clumsiness, gait disturbance, generalised hypotonia and muscle weakness, choreic movements of the limbs and behavioural disturbances. Following the diagnosis of chorea mollis, the patient received prophylaxis (monthly injections of benzathine benzyl penicillin).