Giacobazzi Mario, Singh Neil
Lake Erie College of Osteopathic Medicine, Erie, PA.
UPMC Jameson, New Castle, PA.
J Hand Surg Glob Online. 2023 May 18;5(4):474-476. doi: 10.1016/j.jhsg.2023.04.010. eCollection 2023 Jul.
The extensor digiti minimi is a muscle in the posterior compartment of the forearm that extends the fifth digit. Variations of the extensor tendons of the hand are common and mostly asymptomatic, however, some may impinge and occupy the narrow dorsal compartments of the wrist causing dorsal wrist pain and impairment of digital movement. Orthopedic literature illustrates how frequent anomalies of the extensor indicis proprius, extensor digitorum brevis manus, and extensor medii proprius occur; however, minimal literature documents a bulbous, multi slip extensor digiti minimi. Within this case, a 30-year-old, right-handed woman with no prior hand trauma presented with recurrent snapping localized to her right fifth digit, causing intermittent pain and an audible "click". This study aims to provide a thorough anatomical description of a rare extensor digit minimi anomaly and a viable option to treat successfully an inflamed, symptomatic extensor retinaculum affecting the extensor digiti minimi.
小指伸肌是前臂后群肌中的一块肌肉，负责伸展小指。手部伸肌腱的变异很常见，且大多没有症状，然而，有些变异可能会受到挤压并占据腕部狭窄的背侧间隙，导致腕背疼痛和手指活动受限。骨科文献阐述了示指固有伸肌、手背短伸肌和中指固有伸肌的异常情况有多常见；然而，关于小指伸肌呈球根状、多肌腱束的文献记载极少。在此病例中，一名30岁的右利手女性，既往无手部外伤史，出现了局限于右小指的反复弹响，伴有间歇性疼痛和可闻及的“咔哒”声。本研究旨在对一种罕见的小指伸肌异常进行详尽的解剖学描述，并提供一种可行的方法，以成功治疗影响小指伸肌的发炎且有症状的伸肌支持带。
