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We hypothesized that aberrant crypt foci (ACF) are precursors of colon cancer; their prevention would correlate with cancer risk and their elimination would reduce that risk. In this study we wished to (1) establish the feasibility of stain-enhanced magnification colonoscopy, (2) determine whether colorectal cancer is asociated with increased numbers of ACF, and (3) investigate the natural history of ACF and the durability of their elimination.
Chemoprevention is the use of certain substances to keep cancer from forming, growing, or coming back. Curcumin is a compound found in plants that may prevent colon cancer from forming. This phase II trial is studying how well curcumin works in preventing colon cancer in smokers with aberrant crypt foci.
The purpose of this study is to determine the effectiveness of curcumin in reducing the number of aberrant crypt foci (ACF) in the colon.