PART I. Epidemiology, Pathology and Diagnosis.- Chapter 1. Epidemiology and risk stratification as a guide for an effective screening strategy in the west.- Chapter 2. Carcinogenesis in the Era of Molecular Classifications.- Chapter 3. Carcinogenesis in the Era of Molecular Classifications.- Chapter 4. The new field of view of endoscopy and histological diagnosis.- Chapter 5. Hereditary gastric cancer.- Part II. Staging.- Chapter 6. EGDS and EUS.- Chapter 7. CT scan and PET/CT scan.- Chapter 8. CT scan and PET/CT scan.- Part III. Treatment.- Chapter 9. Early Gastric Cancer.- Chapter 10. Locally Advanced Gastric Cancer.- Chapter 11. The uncertainty of real life.- Chapter 12. Stage IV.- Chapter 13. Synopsis of Treatment Indications.- Part IV. New frontiers to improve prognosis.- Chapter 14. Tailored Treatment strategies based on new molecular classifications.- Chapter 15. Focus on Poorly Cohesive Gastric Cancer.- Chapter 16. Target Therapy and Immunotherapy.- Part V. Perioperative-management and Follow-up.- Chapter 17. The weight of nutrition in the therapeutic course.- Chapter 18. ERAS protocols.- Chapter 19. Complications after gastrectomy.- Chapter 20. Long-term outcome and follow-up.- Part VI. Technical notes in gastric surgery (Video Content).- Chapter 21. Laparoscopic D2 dissection.- Chapter 22. D3 open dissection.- Chapter 23. Minimally invasive reconstruction in subtotal gastrectomy.- Chapter 24. Minimally invasive reconstruction total gastrectomy.- Chapter 25. PIPAC.- Chapter 26. Indocyanine green fluorescence.- Chapter 27. ESD.