Complex bilateral polysyndactyly featuring a triplet of delta phalanges in a syndactylised digit.

The delta phalanx is a rare congenital skeletal anomaly. An abnormal C-shaped epiphysis is usually responsible for a progressive angular digital deformity observed either in hands or feet. Solitary delta phalanges are usually described. We report a case of bilateral congenital hand malformations featuring a triplet of delta phalanges affecting a single digit on one hand, together with a concealed central polydactyly on the other.