Pathogenesis of esophageal cancer.-  Endoscopic Treatment of Pre-Malignant and Early Esophageal Malignancy -- The Volume-outcome Relationship, Standardized Clinical Pathways and Minimally Invasive Surgery for Esophagectomy -- Goals of Surgical Therapy for Esophageal Cancer -- Optimization of Patients for Esophageal Cancer Surgery -- Pathogenesis of Gastric Cancer -- Standards for Surgical Therapy of Gastric Cancer -- Endoscopic Submucosal Dissection for Gastric Cancer--Its Indication, Technique, and Our Experience.-Multimodality Therapy in Gastric Cancer -- Laparoscopic Transhiatal Esophagectomy for Esophageal Cancer -- Laparoscopic and Thoracoscopic Esophagectomy with EEA Anastomosis -- Laparoscopic and Thoracoscopic Esophagectomy with Side-Side Thoracic Anastomosis -- Laparoscopic and Thoracoscopic Transhiatal Esophagectomy with Cervical Anastomosis -- Laparoscopic and Thoracoscopic Esophagectomy with Colonic Interposition -- Thoracolaparoscopic Esophagectomy in the Prone Position for Carcinoma of the Esophagus -- Thoracoscopic Enucleation of Esophageal Benign Tumors -- Minimally Invasive Feeding Tube and Esophageal Stent Placement -- Robotic Utilization in Esophageal Cancer Surgery -- Minimally Invasive Intragastric Surgery -- Laparoscopic Partial Gastrectomy -- Principles and Practice of Laparoscopic Gastrectomy with Gastroduodenostomy (Billroth I) -- Laparoscopic Subtotal Gastrectomy with Gastrojejunostomy and D2 Lymphadenectomy -- Laparoscopic Proximal Gastrectomy with Double Tract Anastomosis -- Laparoscopy-Assisted Total Gastrectomy -- Robotic Utilization in Gastric Cancer Surgery.