在解剖1具成年男性标本时,见其肠系膜下动脉起于腹主动脉前壁,向左下方下降,分出左结肠、乙状结肠和直肠上动脉伴乙状结肠畸形,现报道如下:标本胸腹部未见手术切口疤痕,胸腹腔脏器及主动脉腹部的血管分支(除肠系膜下动脉外)均未见异常。本例肠系膜下动脉于 L3～4椎间盘前方起于腹主动脉的前壁(管径为7mm),斜向右行于腹主动脉的右侧,距起点2cm处向右上发出一支左结肠动脉,该动脉先 Anatomy in an adult male specimens, see the inferior mesenteric artery in the anterior abdominal wall, down to the left, the separation of the left colon, sigmoid colon and rectal artery with sigmoid colon deformity, are reported below: no chest and abdomen specimens Surgical incision scar, thoracic and abdominal visceral organs and aortic vascular branches (except for the inferior mesenteric artery) were normal. In this case, the inferior mesenteric artery starts at the anterior wall of the abdominal aorta (diameter 7mm) in front of the L3 ~ 4 intervertebral disc and runs obliquely to the right of the abdominal aorta to the right of the abdominal aorta. A left colonic artery The arteries first