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Abstract
IntroductionAlthough spontaneous extensor tendon rupture often occurs in association with rheumatoid arthritis, extensor tendon rupture associated with osteoarthritis of the distal radioulnar joint has been rarely reported.Case presentationWe present the case of a 74-year-old Asian woman with a fourth and fifth extensor tendon rupture caused by instability of the ulnar head associated with an osteoarthritic distal radioulnar joint. Intraoperative findings showed that the cause of the dorsal capsular perforation and extensor tendon rupture was mechanical friction with the unstable ulnar head, which had no osteophytes or roughness. After tendon transfer and resection of the ulnar head, our patient can extend her ring and little fingers without difficulty for her daily activities.ConclusionsWhen a patient with osteoarthritic distal radioulnar joint has instability of the ulnar head and the ‘scallop sign’ on radiography, physicians should consider the possibility of extensor tendon rupture as a complication.
Highlights
Spontaneous extensor tendon rupture often occurs in association with rheumatoid arthritis, extensor tendon rupture associated with osteoarthritis of the distal radioulnar joint has been rarely reported.Case presentation: We present the case of a 74-year-old Asian woman with a fourth and fifth extensor tendon rupture caused by instability of the ulnar head associated with an osteoarthritic distal radioulnar joint
When a patient with osteoarthritic distal radioulnar joint has instability of the ulnar head and the ‘scallop sign’ on radiography, physicians should consider the possibility of extensor tendon rupture as a complication
Introduction spontaneous extensor tendon rupture often occurs in association with rheumatoid arthritis [1,2], extensor tendon rupture associated with osteoarthritis of the distal radioulnar joint (DRUJ) has been rarely reported [3,4,5,6,7,8]
Summary
When a patient with osteoarthritic DRUJ has instability of the ulnar head and a ‘scallop sign’ on radiography, physicians should consider the possibility of extensor tendon rupture as a complication. Consent Written informed consent was obtained from the patient for publication of this case report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal. Competing interests All authors declare that they have no competing interests. Authors’ contributions SWL reviewed and interpreted the patient data and X-ray. CHC performed the operation and was a major contributor in writing the manuscript. All authors read and approved the final manuscript
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