材料为一例身高157cm,年龄约三十岁左右的哈萨克女性尸体.右腋静脉主干上有一2×0.5cm大小梭形裂孔.该孔位置在腋静脉第二段平胸外侧静脉注入处.静脉管壁完好无损,前臂内侧皮神经由外向内穿过该静脉裂孔.前臂内侧皮神经主干穿经静脉孔后沿臂内侧下行3cm后即分为二支,一支分布于臂内侧皮肤,另一支在前臂内侧行走.查左侧无此变异. The material is an example of a 157cm-long Kazakh female whose body is about 30 years old.The spindle of the right axillary vein has a fissure hole of 2 × 0.5cm in size, which is located at the lateral ventricle of the extrathoracic vein at the second stage of the axillary vein.The vein wall Intact, the medial cutaneous nerve of the forearm passes through the venous hole from the outside to the inside.The forearm medial cutaneous nerve trunk passes through the venous hole and is divided into two branches along the medial side of the arm, which is divided into two branches, one in the medial arm and the other in the Walking inside the forearm. Check the left without this mutation.