摘要胃癌是危害我国肿瘤患者的排在前5位的肿瘤，肿瘤转移严重影响肿瘤患者的预后，胃癌的胃周淋巴结转移是胃癌最主要转移途径，“第5转移”等理念的提出，使胃外科医生对胃系膜的重要性有了充分的认识。规范化D2淋巴结清扫术是局部进展期胃癌最有效的治疗措施，是可手术胃癌患者能否治愈的重要措施。本文就精准医学时代下的胃癌D2淋巴结清扫术中有关全胃系膜切除中规范化解剖、术式及注意事项等结合自己的临床经验提出了见解，以供胃肠外科医生同道提供参考。

abstractsThe “Metastasis type V”, “Envelope” theory and other concepts have been proposed to make gastric surgeons have a full understanding of the importance of mesogastrium, and the correct identification of the boundary of the mesogastrium is the premise of the complete mesogastrium excision(CME), and also the best way to achieve truly standardized D2 lymph node dissection for gastric cancer. In this paper, the boundary of the mesogastrium during complete mesogastrium excision for gastric cancer and how to achieve this operation in practice were studied, which help gastric surgeons finally find the mesogastrium tissue distributed throughout the gastric cancer surgery to achieve the best surgical treatment effect.