Lymphovascular supply

The entire arterial supply of the stomach is derived from the coeliac artery which arises from the aorta. Veins drain into the portal system. The lymphatics drain to the coeliac lymph nodes. The so-called N1 and N2 node groups (12 in total) are situated along the arterial supply (Figure 2.2). N1 nodes are within 3 cm of the primary malignancy and N2 nodes more than 3 cm from the tumour.

The main nerve supply to the stomach is from the anterior and posterior vagal trunks, with the innervation of the pylorus being mainly derived from the anterior vagus.

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