Results: Dissection of mesenteric vessels, lymphadenectomy, and identification of the surgical plane were guided by the landmark of the superior mesenteric vein (SMV).

• 结果：利用中间入路，以肠系膜上静脉为解剖学标志，可成功进行系膜血管的解剖、淋巴结清扫，并进入正确的外科平面。