A New Variant of Type I Congenital Ulna Deficiency With the Normal Thumb, Webspace, Hand, and Elbow

Abstract

Unilateral congenital ulna deficiency of wrist and forearm is rare. It is associated with cartilaginous ulnar anlage, absence of ulnar digits, carpus, partially or completely absent ulna, radiohumeral synostosis, syndactyly, and thumb abnormalities. Various classifications have described this presentation. We report a new variant of type I congenital ulnar deficiency in wrist and forearm with a normal thumb, first webspace, hand, wrist, and elbow in an 18-year-old girl.

Ulnar longitudinal deficiency; type D of Cole and Manske’s classification and type V of Goldfarb’s: A case report

“…However, this is mostly performed based on the progressive de ciencies of the ulna and elbow. Ogino and Kato classi ed the hand abnormalities solely based on the degree of the ulnar defect and overlooked the high incidence of the thumb anomalies in congenital ulnar de ciency 7 . On the contrary, considering the involvement of the thumb as well as the rst web space, Cole and Manske divided patients into four types 8 .…”

Rehabilitation Strategies for Wrist Pain in a Patient With Thalassemia Major and Distal Ulnar Hypoplasia: A Case Report

“…Various classifications have been developed, focusing on deficiencies in the elbow, forearm, carpal bones, fingers, thumb, and the first web space. Type I represents a mild form of deficiency characterized by the presence of a normal first webspace and thumb, while ulnar digits and carpus are absent [9]. Negative ulnar variance is a frequently seen condition where the ulna bone is shorter than the radius bone.…”