McClelland Walter B, Means Kenneth R
Curtis National Hand Center, MedStar Union Memorial Hospital, Baltimore, MD, USA.
J Hand Surg Am. 2012 Apr;37(4):695-8. doi: 10.1016/j.jhsa.2012.01.006. Epub 2012 Mar 6.
Palmaris profundus is an aberrant muscle of forearm and wrist anatomy. It has no discernible function, but its tendon has been implicated as a cause of carpal tunnel syndrome. Previously, all cases of palmaris profundus in the literature have been encountered during either open surgery or cadaveric dissection. We report a case of palmaris profundus encountered during attempted single-portal endoscopic carpal tunnel release, necessitating conversion to an open approach. There was a unique point of tendon insertion onto the undersurface of the transverse carpal ligament, more proximal than what has been previously described in the literature. There were other anomalies present as well, including a persistent median artery and bifid median nerve. Given the volar position of the structure, its proximal point of insertion, and its minimal bulk, we did not feel that this was the cause of our patient's carpal tunnel syndrome.
掌长深肌是前臂和腕部解剖结构中的一种变异肌肉。它没有明显的功能，但其肌腱被认为是腕管综合征的一个病因。此前，文献中报道的所有掌长深肌病例均是在开放手术或尸体解剖过程中发现的。我们报告了一例在尝试单通道内镜下腕管松解术时发现掌长深肌的病例，这使得手术不得不转为开放手术。该肌腱在腕横韧带下表面有一个独特的附着点，比文献中先前描述的位置更靠近近端。此外还存在其他异常情况，包括持续存在的正中动脉和分叉的正中神经。鉴于该结构的掌侧位置、近端附着点以及其较小的体积，我们认为这不是我们患者腕管综合征的病因。
