Feasibility Study of Sentinel Navigation Surgery After Non-curative Endoscopic Resection

Inclusion Criteria

• •No limitation for age if the patient is available for gastrectomy
• •Patient who underwent endoscopic submucosal dissection and the tumor was defined as out of indication.
• •The expanded criteria for endoscopic resection are as follows
• •criterion I: intramucosal tumor without ulcerative findings and of differentiated type with size \> 2 cm
• •criterion II: intramucosal tumor with ulcerative findings and of differentiated type with size ≤ 3 cm
• •criterion III: intramucosal tumor without ulcerative findings and of undifferentiated type with size \< 2 cm
• •criterion IV, submucosal invasion \< 500 mm and of differentiated type with size ≤ 3 cm)
• •Eastern Cooperative Oncology Group (ECOG) performance scale 0 or 1