[Theory and practice on mesentery margin in vessel-oriented complete mesentery resection of gastric cancer].

The concept of mesenteric anatomy has been evolving in cognition. With the continuous development of endoscopic techniques, the submicroscopic structures of many mesenteries have been gradually understood, ultimately confirming the ubiquitous presence of mesenteries in the digestive organs. Based on various domestic and foreign mesenteric anatomical theories and combined with years of clinical practice, we have summarized and proposed a new concept and theory-vascular-guided complete mesenteric resection for gastric cancer. The theoretical basis is that, from the perspective of the embryonic development of the digestive tract, the rotation of the digestive tract and its associated mesentery is always centered on blood vessels. Therefore, the supply vessels and digestive tracts and their associated mesentery are naturally connected. The mesentery is a complex structure that encompasses blood vessels, nerves, and lymphatic tissues. The blood vessels serve as the boundary of the mesentery, ensuring that the lymphatic network that drains the tumor is maximally resected. This article focuses on the complete mesenteric resection margins in gastric cancer surgery, that is, the lateral boundary of the mesentery as the vascular-supplied guided resection boundary and its mesentery, and the base boundary as the mesenteric bed. Using precise vascular guidance to define the extent of mesenteric resection will help accurately define the mesenteric margin during radical resection for different stages of gastric cancer.