Hereditary nonpolyposis colorectal cancer (HNPCC) is characterized by an increased risk of colorectal cancer and other cancers such as endometrium, ovary, stomach, small intestine, hepatobiliary tract, upper urinary tract, brain, and skin. This increased risk is due to inherited mutations that degrade the self-repair capability of DNA. Individuals with HNPCC have about an 80% lifetime risk for colon cancer. Two-thirds of these cancers occur in the proximal colon. The mean age of colorectal c ...
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