Endoscopic submucosal dissection (ESD) is a standard treatment for gastric superficial lesions. Additional gastrectomy with lymph node (LN) dissection should be considered for patients with non-curative resections, owing to the risk of residual cancer (RC) and LN metastasis (LNM). Nevertheless, in clinical practice, few patients are found to have RC or LNM after additional surgery. Therefore, we aim to evaluate clinical outcomes of patients who underwent non-curative gastric ESD in our center.