Munn Alexandra, Gillis Joshua
Division of Orthopedic Surgery, St. John's, Newfoundland, Canada.
Division of Plastic and Reconstructive Surgery, St. John's, Newfoundland, Canada.
J Hand Surg Glob Online. 2023 Nov 18;6(1):114-116. doi: 10.1016/j.jhsg.2023.10.005. eCollection 2024 Jan.
Supernumerary extensor pollicis longus (EPL) and extensor indicis proprius tendons are infrequently reported. There are few case reports on more than one accessory tendon in one individual. As a result, they are not represented in previously described classifications for variations in extensors to the thumb. Elective surgery was performed on a 57-year-old right-handed female. Within the fourth compartment, two anomalous accessory tendons were present. These tendons were identified as an accessory EPL tendon and an accessory extensor indicis proprius tendon. The normal EPL tendon occupied the third compartment ulnar to Lister's tubercle, as usual. The previous classification system for anomalous EPL tendons is useful in the organization and description of thumb extensor tendon variations. However, it is not a complete representation of the anomalies identified, including the one in this report. We have proposed an additional category for this classification system to better encompass the variation in anomalous tendon anatomy.
额外的拇长伸肌腱（EPL）和示指固有伸肌腱很少被报道。关于一个人有不止一条副肌腱的病例报告很少。因此，它们未被纳入先前描述的拇指伸肌变异分类中。对一名57岁右利手女性进行了择期手术。在第四腱鞘内，发现了两条异常的副肌腱。这些肌腱被确定为一条副EPL肌腱和一条副示指固有伸肌腱。正常的EPL肌腱像往常一样位于Lister结节尺侧的第三腱鞘内。先前的异常EPL肌腱分类系统在组织和描述拇指伸肌腱变异方面很有用。然而，它并未完整呈现所发现的异常情况，包括本报告中的情况。我们已为此分类系统提出了一个额外的类别，以更好地涵盖异常肌腱解剖结构的变异。
