Cancer incidence following subtotal gastrectomy

Area of Science:

• Oncology
• Gastroenterology
• Epidemiology

Background:

• Peptic ulcer disease treatment often involves subtotal gastrectomy.
• Long-term health outcomes, including cancer development, after gastrectomy require further investigation.

Purpose of the Study:

• To assess the risk of developing colon and lung cancer in Hawaiian Japanese men following subtotal gastrectomy for peptic ulcers.
• To examine the influence of lifestyle factors like cigarette and alcohol consumption on cancer risk post-gastrectomy.

Main Methods:

• A cohort study followed 432 Hawaiian Japanese men who underwent subtotal gastrectomy between 1971-1975.
• Cancer development was compared against a control group of 6161 non-gastrectomized men.
• Statistical analyses adjusted for cigarette and alcohol consumption, and anthropometric/lipid measurements.

Main Results:

• Gastrectomized men exhibited significantly increased risks for colon cancer (P = 0.008) and lung cancer (P = 0.002).
• The association between gastrectomy and lung cancer remained significant after adjusting for smoking (P = 0.03).
• Colon cancer risk persisted after adjusting for alcohol consumption (P = 0.02), despite higher alcohol intake in the gastrectomized group. Undernutrition indicators (lower body weight, serum lipids) were noted in gastrectomized individuals.

Conclusions:

• Subtotal gastrectomy for peptic ulcers is associated with elevated risks of colon and lung cancer.
• The increased cancer risk appears independent of smoking and alcohol consumption, suggesting other contributing factors.
• Potential roles of undernutrition and other unmeasured variables in post-gastrectomy cancer development warrant further research.