This document discusses surgical techniques for treating gastroesophageal cancers and early stage esophageal adenocarcinoma. It finds that laparoscopic staging is useful for gastric cancer and laparoscopic resection may provide benefits over open surgery. While D2 lymphadenectomy provides more thorough staging, it also carries higher risks than D1 with no clear survival benefit. For early esophageal cancers, esophagectomy carries a small but definite risk of recurrence compared to endoscopic mucosal resection, but laparoscopic esophagectomy outcomes are similar to open surgery.