Gastric Cancer Risk Factors and Screening

Clinical Implications

• The National Comprehensive Cancer Network recommends screening for family history of gastric cancers as part of the standard workup for all patients 1
• For high-risk individuals, endoscopic surveillance should be considered, especially in regions with high gastric cancer prevalence 2, 3

Geographical Considerations

• In Western countries, gastric cancer tumors are predominantly located in the proximal stomach, while in Japan and other parts of Asia, distal tumors remain predominant 4

Pitfalls and Limitations

• Blood type is just one of many risk factors for gastric cancer and should be considered alongside other established risk factors such as H. pylori infection, smoking, diet, and family history 1
• While blood type is a non-modifiable risk factor, focusing on modifiable risk factors (H. pylori eradication, smoking cessation) remains crucial for gastric cancer prevention 1