Super digit.

This article describes a clinical entity under the new name "super digit." The anomaly represents a conglomerate of several different malformations and syndromes. Twenty patients with 24 super digits are presented. The two main types of super digits are discussed: Type I, which has two metacarpals that support a single oversized digit; and Type II, which has a single metacarpal that supports two or more digits distally. These digits, with growth, display several complications such as enlargement, deviation, angulation, loss of motion, and undergrowth. The anomalies singly and collectively present problems that require similar surgical procedures for correction.