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Colon cancer stool: What to look for and how to test at home

Other conditions that can look like colon cancer

A few other conditions can affect your stools, including:

  • Swollen veins in the anus and lower rectum, called hemorrhoids.
  • A small tear in the thin, moist tissue that lines the anus, called an anal fissure.
  • Inflammatory bowel diseases, such as Crohn's disease or ulcerative colitis.
  • Infection.
  • Certain foods or medicines.