Senda Hiroya, Muro Hidenori
Department of Orthopaedic Surgery, Ogaki Municipal Hospital, Gifu Prefecture, Japan.
Hand Surg. 2007;12(2):87-90. doi: 10.1142/S0218810407003481.
A 59-year-old man suffered from subcutaneous rupture of the flexor tendon of the little finger associated with fracture of the hook of hamate. He could not flex his little finger completely at the distal interphalangeal joint, but incomplete flexion of the proximal interphalangeal joint was possible. Surgical exploration revealed anomaly of the flexor digitorum superficialis of the little finger, as it originated from the palmar aspect of the carpal ligament, and a small portion of the muscle belly was traversed toward the A1 pulley over the profundus tendon and then it ran into the A1 pulley as a normal superficialis tendon. The flexor digitorum superficialis of the little finger is well known to show variations, but our case is extremely rare, and furthermore there are no reports in the available literatures about the function of this anomalous muscle.
一名59岁男性患有小指屈肌腱皮下断裂并伴有钩骨钩骨折。他的小指在远侧指间关节处无法完全屈曲，但近侧指间关节可进行不完全屈曲。手术探查发现小指指浅屈肌存在异常，它起自腕横韧带掌侧，一小部分肌腹越过指深屈肌腱向A1滑车走行，然后作为正常的指浅屈肌腱进入A1滑车。小指指浅屈肌出现变异是众所周知的，但我们的病例极为罕见，而且现有文献中没有关于这种异常肌肉功能的报道。
