Colonic diseases are diseases that affect the colon. The term covers a wide range of diseases, including inflammatory bowel disease – Crohn’s disease and ulcerative colitis – diverticular disease, and colon cancer.


Several diseases can interfere with the normal functioning of the colon. These diseases are classified as benign (noncancerous) or malignant (cancerous). They can cause symptoms including bleeding, infection, and perforation.

  • Colorectal cancer.
  • Colonic polyps – extra tissue growing in the colon that can become cancerous.
  • Ulcerative colitis – ulcers of the colon and rectum.
  • Diverticulitis – inflammation or infection of pouches in the colon.
  • Irritable bowel syndrome – an uncomfortable condition causing abdominal cramping and other symptoms.