Skip Navigation LinksHome > April 2014 - Volume 93 - Issue 4 > Neglected Ruptured Flexor Carpi Ulnaris Tendon Mimics a Soft...
American Journal of Physical Medicine & Rehabilitation:
doi: 10.1097/PHM.0000000000000030
Case Reports

Neglected Ruptured Flexor Carpi Ulnaris Tendon Mimics a Soft Tissue Tumor in the Wrist

Rau, Chi-Lun MD; Yen, Tze-Hsun MD; Wu, Lien-Chen MD; Huang, Yi-You PhD; Jaw, Fu-Shan PhD; Liou, Tsan-Hon MD, PhD

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ABSTRACT: A wrist mass is rarely caused by a ruptured tendon in the forearm. The common pathologies are ganglia, tendon tenosynovitis, and giant cell tumors of tendon sheaths. Less common causes are nerve sheath tumors, vascular lesions, or an accessory muscle belly. The authors investigated a case of neglected ruptured flexor carpi ulnaris tendon that mimics a mass in the wrist. To the authors’ knowledge, this is the first case report in relevant literature. During investigation, the high-resolution musculoskeletal ultrasound suggested a soft tissue tumor or a ruptured flexor carpi ulnaris tendon. The magnetic resonance imaging scan indicated an accessory flexor carpi ulnaris muscle belly. The diagnosis of ruptured flexor carpi ulnaris tendon was confirmed by surgical exploration. This case indicates that ultrasound may be better suited than magnetic resonance imaging in evaluating a wrist mass for its accuracy, availability, and portability.

© 2014 by Lippincott Williams & Wilkins


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