我们在解剖一具老年男性标本时,发现其左侧腋动脉分支变异(图1),现报道如下:左侧腋动脉长8.90 cm,起始口径为6.85 mm,经正中神经内侧根的前面下行,于大圆肌腱下缘延续为肱动脉(中段外径3.74mm)。该侧腋动脉在第二段外下缘发出一变异动脉干(长4.41cm,起始外径5.30 mm)。该动脉干从正中神经内、外侧根之间穿过后行向外下,分为内、外2个分支: We dissect an elderly male specimen and found that the left axillary artery branch variation (Report 1), are reported as follows: the left axillary artery length 8.90 cm, the initial diameter of 6.85 mm, the medial nerve root in front of the down , The lower edge of the great circle tendon brachial artery (middle diameter 3.74mm). The side axillary artery in the second paragraph of the outer edge of a variant arterial trunk (length 4.41cm, initial diameter 5.30 mm). The artery from the median nerve inside and outside the roots through between the line after the outward line, divided into inner and outer 2 branches: