Arch Hand Microsurg 2018; 23(2): 87-92  
Delayed Rupture of Flexor Tendons due to a Malunion of Distal Radius Fracture
Tae Gyun Kim, Youn Moo Heo, Jin Woong Yi, Byung Hak Oh, Chang Uk Ham
Department of Orthopedic Surgery, College of Medicine, Konyang University, Daejeon, Korea
Correspondence to: Youn Moo Heo
Department of Orthopedic Surgery, Konyang University Hospital, 158 Gwanjeodong-ro, Seo-gu, Daejeon 35391, Korea
TEL: +82-42-600-6902, FAX: +82-42-545-2373, E-mail: hurym1973@hanmail.net
Received: February 2, 2018; Revised: March 31, 2018; Accepted: April 6, 2018; Published online: June 1, 2018.
© Korean Society for Surgery of the Hand, Korean Society for Microsurgery, and Korean Society for Surgery of the Peripheral Nerve. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Tendon ruptures of the finger may occur due to various causes around the wrist. Because the malunion of distal radius affects the morphology of distal radioulnar joint (DRUJ), it may cause an arthritis of this joint. Progression of arthritis of the DRUJ may result in bony spurs, dislocation of ulnar head, or change of inclination of sigmoid notch. These changes can cause the attritional rupture of tendons around the DRUJ. We experienced an attritional rupture of 4/5th flexor tendons in a patient with arthritis of the DRUJ and palmar subluxation of ulnar head caused by malunion of distal radius. Although an attritional rupture of flexor tendons is less common than that of extensor tendons, progression of attritional ruptures and management are similar. However, because there are some differences between the former and the latter in radiologic findings and surgical considerations, we report this case with a review of the literature.
Keywords: Distal radius, Distal radioulnar joint, Malunion, Arthritis, Flexor tendon rupture


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