Endoscopic submucosal dissection (ESD) is the technique that has replaced surgery in the treatment of early neoplastic lesions of the stomach (LNPS). ESD of LNPS allows: a) less invasiveness compared to surgery; b) greater chances of en bloc resection and R0 resection compared to mucosectomy for lesions larger than 15 mm. Recent 2015 ESGE guidelines provide precise recommendations for the use of ESD in the treatment of LNPS, but Italy lacks prospective data on the efficacy and safety of ESD in a large sample of patients. A multicenter prospective observational study to create a database on the use of ESD in LNPS is essential to provide information regarding the efficacy and safety of ESD in Italy. This database would also provide information regarding the criteria applied in the use of ESD in the treatment of early gastric neoplasia