Risk Factors for Colorectal Cancer -- Exact Causes Are Unknown

Although the exact causes of colorectal cancer are not known, studies show that certain factors are linked to an increased chance of developing the disease.

Who's at risk?
There are a number of personal factors influencing who is more likely than others to develop colon or rectal cancer. Follow the link below for the details.

  • Age
  • A history of cancer
  • A history of polyps
  • A history of inflammatory bowel disease
  • Race

Risk factors linked to family

  • Family history
  • Familial adenomatous polyposis (FAP)
  • Gardner's syndrome
  • Hereditary nonpolyposis colorectal cancer (HNPCC)
  • Ashkenazi Jews

Lifestyle risk factors

  • Smoking
  • Diet
  • Exercise
  • Alcohol

Seattle Cancer Care Alliance
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