在制作一成人左上肢血管神经标本时,发现其掌浅弓、掌深弓异常,并有多处手掌动脉呈现Z型异常扭曲,现报道如下。该标本桡动脉在桡腕关节处未发出掌浅支,而是以单干转至手背,在桡骨茎突下入鼻咽窝发出变异的拇主要动脉,终支构成掌深弓。变异的拇主要动脉穿拇收肌后在其浅面发出拇指桡侧固有动脉,其外径为1.16 mm。分支后外径为1.44 In the production of an adult left upper extremity vascular nerve specimens, found that the superficial palmar arch, palm bow arch abnormalities, and many palm artery showed abnormal Z-shaped, are reported below. The radial artery in the radial wrist joint did not issue the palm superficial branch, but to single-handedly transferred to the back of the hand, in the radial styloid process into the nasopharyngeal variability of the main artery of the thumb, the terminal branch constitutes the palm of the deep bow. The anterior descending artery of the thumb had a natural radial artery of thumb attached to the superficial face of the thumb, with an outer diameter of 1.16 mm. The outer diameter of the branch is 1.44