Question: How does smoking increase colon cancer risk?
Answer: Smoking increases your risk of developing colon cancer for two main reasons. First, inhaled or swallowed tobacco smoke transports carcinogens to the colon. Second, tobacco use seems to increase polyp size.
In general, the bigger the polyp, the greater the chance it will become cancerous. Studies indicate that 12% of fatal colorectal cancers may be attributable to smoking.
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