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Objective Laparoscopy-assisted gastrectomy(LAG) has been indicated to be feasible and oncologically safe for early gastric cancer.Despite the rapid increase in the number of LAG cases,few reports have investigated the long-term outcomes of T4a(serosal invasion) gastric cancer after LAG.The aim of the present study was to evaluate the long-term clinical outcomes in patients with stage T4a gastric cancer after laparoscopic gastrectomy.