From F. Edward Hérbert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD (Mr. Mullin), and the U.S. Army Medical Service Corps, Tripler Army Medical Center, Honolulu, HI (Mr. Mullin, Dr. Deal, and Dr. Krul).
J Am Acad Orthop Surg Glob Res Rev. 2020 Oct 7;4(10):e20.00029. doi: 10.5435/JAAOSGlobal-D-20-00029.
We report a rare variant of the thenar motor branch (TMB) of the median nerve. A preligamentous TMB was discovered during revision carpal tunnel release in a 49-year-old man. The prevalence and characteristics of TMB variations are discussed. The literature describing iatrogenic injury to the TMB variants, surgical treatment, and preoperative screening tools is reviewed. Recognition of anatomic variants of the TMB is essential considering notable consequences of iatrogenic injury.
我们报告正中神经鱼际肌支（TMB）的一种罕见变异。在一名 49 岁男性的腕管松解术翻修过程中发现了韧带前 TMB。讨论了 TMB 变异的流行率和特征。回顾了描述 TMB 变异的医源性损伤、手术治疗和术前筛查工具的文献。考虑到医源性损伤的显著后果，识别 TMB 的解剖变异至关重要。
