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Posterior interosseous nerve syndrome secondary to compression by an intramuscular hemangioma

BACKGROUND
We reported a case of posterior interosseous nerve syndrome secondary to compression by intramuscular hemangioma of supinator muscle.


CASE REPORT
A 45-year-old female patient visited our outpatient clinic due to inability to fully extend the fingers of the right hand. Ultrasonographic and magnetic resonance imaging findings revealed a mass within the supinator muscle. During surgery, a mass (3.0 ×; 2.0 ×; 1.5 cm) was found within the supinator muscle and intermuscular space, by which the posterior interosseous nerve was compressed and exhibited pale surface and proximal edema. The mass was completely resected and pathologically confirmed as a cavernous hemangioma. At 10 weeks postoperation, the function of the affected limb was completely restored.


CONCLUSION
For patients suspicious for posterior interosseous nerve syndrome, imaging examinations are necessary to identify the cause, the location and degree of nerve compression. Appropriate intervention should be timely performed to maximize the recovery of nerve function. This article is protected by copyright. All rights reserved.