Chiu D T
Plast Reconstr Surg. 1981 Dec;68(6):937-9. doi: 10.1097/00006534-198112000-00017.
A supernumerary extensor tendon to the left thumb was observed in a black female cadaver. It came from a bipinnate extensor indicis proprius and passed through the fourth synovial compartment, where it fused with the extensor pollicis longus at the midshaft level of the first metacarpal. This appears to be a rare anatomic variation. Since the review of LeDouble in 1897, only two cases have been reported. A reminder of this oddity at this time seems appropriate because of its perceivable clinical significance.
在一具黑人女性尸体上观察到左手拇指有一条额外的伸肌腱。它起自双羽状的示指固有伸肌，穿过第四滑膜腔，在第一掌骨中轴水平与拇长伸肌融合。这似乎是一种罕见的解剖变异。自1897年勒杜布尔的综述以来，仅报告过两例。鉴于其可察觉的临床意义，此时提醒人们注意这种异常情况似乎是合适的。
