作者复习了小肠系膜根的正常解剖及病变的CT表现。 正常解剖:小肠系膜是将空、回肠连系于后腹壁的双层腹膜反褶。固定于后腹壁处的部分称小肠系膜根,自十二指肠空肠曲向下斜行止于回盲区,全长15cm,含两个重要的血管即肠系膜上动脉和肠系膜上静脉。与小肠系膜根相邻接的重要结构有肝十二指肠韧带、结肠系膜、胰头区神经丛及淋巴组织。 The authors reviewed the normal anatomy of the small mesenteric root and CT findings of the lesion. Normal anatomy: small mesentery is empty, ileum connected to the retroperitoneal double peritoneal anti-fold. Fixed at the part of the posterior abdominal wall, said the Department of small mesangial roots, duodenal jejunum downward oblique stop in the ileocecal area, full-length 15cm, with two important vessels that the superior mesenteric artery and superior mesenteric vein. An important structure adjacent to the small mesangial root is the hepatoduodenal ligament, the mesocolon, the pancreaticodular nerve plexus, and the lymphoid tissue.