Congenital swan neck deformity of fingers with syndactyly.

Congenital swan neck deformity of the fingers is an uncommon congenital disorder. It is sporadic and not associated with other malformations. We report a case of congenital swan neck deformity of the fingers in a 16-year-old boy, with associated ulnar deviation of the fingers, bilateral simian creases and soft tissue syndactyly.