Baker James, Gonzalez Mark H
University of Illinois at Chicago, 835 S. Wolcott, Suite 209, Chicago, IL 606012, USA.
Hand (N Y). 2008 Dec;3(4):363-5. doi: 10.1007/s11552-008-9097-z. Epub 2008 May 24.
Variation in the extensor muscles of the hand is common. These anatomic deviations are rarely symptomatic. We report a unique case of an anomalous extensor indicis proprius causing a painful snapping wrist. Intraoperative examination revealed a disproportionately large muscle belly under the extensor retinaculum causing subluxation of the ring and small extensor tendons creating a painful snapping phenomenon. Following excision, the subluxation and pain resolved.
手部伸肌的变异很常见。这些解剖学上的偏差很少有症状。我们报告了一例独特的异常示指固有伸肌导致腕部疼痛弹响的病例。术中检查发现,伸肌支持带下有一个不成比例的大肌腹,导致环指和小指伸肌腱半脱位,产生疼痛的弹响现象。切除后,半脱位和疼痛得以缓解。