Blair W F, Buckwalter J A
J Hand Surg Am. 1983 Jan;8(1):93-4. doi: 10.1016/s0363-5023(83)80063-x.
Congenital malposition of the flexor pollicis longus (FPL), characterized by partial insertion of its tendon into the extensor tendon of the thumb, has been described by several authors. During treatment of a patient with this problem, we identified significant abnormalities of the more proximal anatomy of the hand, including perforation of the transverse carpal ligament by the FPL, a common muscular origin of the FPL and the flexor digitorum profundus (FDP) tendon to the index finger, and branches of the median nerve both palmar and dorsal to the preaxial border of the thumb. Knowledge of those possible anatomical abnormalities associated with malposition of the FPL will aid in the design of reconstructive procedures.
多位作者曾描述过拇长屈肌（FPL）先天性位置异常，其特征为该肌腱部分附着于拇指伸肌腱。在治疗一名患有此问题的患者时，我们发现手部更近端的解剖结构存在明显异常，包括FPL穿过腕横韧带、FPL与示指指深屈肌（FDP）肌腱有共同的肌肉起点，以及正中神经在拇指轴前边界的掌侧和背侧均有分支。了解这些与FPL位置异常相关的可能解剖学异常，将有助于重建手术的设计。
