Gastric cancer

1. Big picture

Gastric cancer is a malignant tumor of the stomach, most commonly adenocarcinoma, and is a major surgical oncology topic because curative treatment depends on complete tumor removal with lymphadenectomy. The practical exam logic is:

Alarm symptoms → upper GI endoscopy + biopsy → staging CT ± laparoscopy
→ MDT decision → perioperative chemotherapy + radical gastrectomy if resectable
→ palliation if metastatic, unresectable, or unfit

For the oral exam, the most important surgical sentence is:

**“Gastric cancer is diagnosed by endoscopy and biopsy, staged by CT and staging laparoscopy if potentially curable, and treated curatively by gastrectomy wit