U.S. practices for colon cancer screening.

As the prevalence of gastric carcinoma decreases in Japan, the prevalence of colon cancer has been increasing. Examination of the screening practices for colon cancer in the United States can offer insight into practices that may be useful in Japan. This paper will review the epidemiology and risk factors for colon cancer, the genetics of colon cancer, prevention issues, screening modalities, and current recommendations in U.S. practice.