The exact causes of colorectal cancer are not known. However, studies have shown that genetics, diet, and lifestyle can affect the risk of developing colorectal cancer.
Family history is one of the most significant risk factors for colorectal cancer.
People who have cancer, colorectal cancer, noncancerous colon polyps, or inflammatory bowel disease are at increased risk of developing colorectal cancer. People who have been treated previously for colorectal cancer are at risk for recurrence. Women with uterine, ovarian, and breast cancer are also at increased risk.