Overview

Colorectal cancer is caused by uncontrolled growth of abnormal cells in the colon or rectum, and the exact cause is still unknown but there are certain risk factors which can be controlled to prevent its occurrence. These include a family history of colorectal cancer, having inflammatory bowel disease such as ulcerative colitis or Crohn's disease, genetic syndromes like Lynch syndrome, being physically inactive, smoking, consuming a diet high in red and processed meat, obesity, age over 50 years old.

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