Pre- and post-ESD discrepancies in clinicopathologic criteria in early gastric cancer: the NECA–Korea ESD for Early Gastric Cancer Prospective Study (N-Keep)

Background Discrepancies in the clinicopathologic parameters pre- and post-endoscopic submucosal dissection (ESD) sometimes necessitate additional surgical resection. The aim of this study was to assess such discrepancies in clinicopathologic parameters before and after ESD in the context of reducing the risk of failure of curative ESD. Methods Data on 712 early gastric cancer patients were prospectively collected from 12 university hospitals nationwide. The inclusion criteria were differentiated carcinoma