Ulnar Dimelia (Mirror Hand)

Abstract

Ulnar dimelia is categorized under duplication and typically

consists of replication of the ulna, absence of radius, polydactyly

comprising seven or eight fingers, and no thumbs.

This results in a bizarre appearance that is often called “mirror

hand” because the hand, wrist, and forearm on the ulnar

side of the limb are reflected as symmetric opposites in the

frontal plane [1].