Constriction band syndrome.

Thirty cases of constriction band syndrome diagnosed and treated with surgery at Ramathibodi Hospital, Bangkok, during 1973 to 1986 are reported. The incidence of this congenital anomaly could not be verified in this series because the number of cases was limited and the cause could not be concluded. The less frequent site of constriction band was the thumb, but acrocephalosyndactyly was the most common associated anomaly.