Outcomes of endoscopic submucosal dissection for early gastric cancer and factors associated with incomplete resection.

Background/aims: The introduction of endoscopic submucosal dissection for the treatment of early gastric cancer has enabled en bloc resection of lesions that cannot be treated with conventional endoscopic mucosal resection. Despite expansion of indications for endoscopic treatment, a considerable number of patients still require additional treatment. The objective of this study was to summarize the outcomes of endoscopic submucosal dissection performed on patients with early gastric cancer and to identify factors associated with incomplete resection and non-curative resection.