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Epidemiology of gastrointestinal polyps
1Division of Epidemiology, Columbia University School of Public Health, New York, New York, USA.
Surgical Oncology Clinics of North America
|July 1, 1996
Summary
Colorectal adenomas, or polyps, are linked to large bowel cancer. While risk factors like diet and obesity are known, interventions to prevent polyp recurrence have shown limited success, but screening with polyp removal is effective.
Area of Science:
- Gastroenterology
- Oncology
- Epidemiology
Background:
- Adenomatous polyps in the large bowel are strongly associated with colorectal cancer.
- The distribution of colorectal adenomas mirrors colorectal cancer incidence across demographics.
- Individuals with a history of adenomas face a higher risk of developing new polyps and cancer.
Purpose of the Study:
- To review the established associations between colorectal polyps and cancer.
- To examine risk factors for adenoma development and recurrence.
- To evaluate the effectiveness of interventions and screening for colorectal cancer prevention.
Main Methods:
- Review of epidemiological data on colorectal adenomas and cancer.
- Analysis of observational studies identifying risk factors for adenoma incidence.
- Assessment of dietary intervention trials and screening effectiveness.
Main Results:
- Geographic, gender, and age patterns of adenomas parallel colorectal cancer.
- Risk factors for adenomas include high-fat/low-fiber diets, family history, obesity, and smoking.
- Dietary interventions have shown limited success in preventing adenoma recurrence.
Conclusions:
- Screening with polypectomy (polyp removal) is effective in reducing colorectal cancer incidence.
- Polypectomy may significantly alter the epidemiology of colorectal cancer.
- Understanding risk factors remains crucial for prevention strategies.