Transient idiopathic dystonia in infancy.

The authors report eight otherwise normal children who presented with transient dystonic postures and/or movements in infancy. The anomalies appeared during the first months of life, progressed during a period then gradually disappeared at follow-up (from 3 months to 5 years). Differential diagnosis with primary orthopedic problems, cerebral palsy and early progressive CNS disease may be difficult at onset of the symptoms. Transient dystonia is probably one of the numerous mechanisms responsible for some abnormalities of tone, posture and movement in infancy and may account for some of the cases labeled as "transient cerebral palsy". Our cases resemble those described by Willemse (19) as "benign idiopathic dystonia in the first year of life".