両側性短伸筋手筋：症例報告と文献レビュー

Extensor digitorum brevis manus is an accessory muscle anomaly found on the dorsum of the hand. This variation in the fourth compartment may lead to preoperative misdiagnosis. In this study, we report the case of a 25-year-old man who presented with bilateral dorsal hand masses associated with pain during hand movement. History, examination, and imaging have led to a diagnosis of extensor digitorum brevis manus. Surgical excision was offered to the patient to relieve his symptoms, with an uneventful postoperative course.