Symmetric hyperphalangism of the index finger in the palatodigital syndrome: a case report.

A case of palatodigital syndrome is added to the eight cases in the literature. The accessory phalanx between the index metacarpal and proximal phalanx produces a significant deformity of extreme radial deviation with mild supination. This deformity was treated by rotation and stabilization of the accessory bone. Follow-up at 1 year shows correction of the radial deviation has been maintained and that the finger has grown appropriately.