GASTROLAB / SCIENCE PHOTO LIBRARY GASTROLAB / SCIENCE PHOTO LIBRARY
Ulcerative colitis. Endoscope view of the colon (part of the large intestine) showing inflammation in a patient with ulcerative colitis. Ulcerative colitis is inflammation of the bowel, typically arising in the rectum and often extending to involve part of, or most of, the large intestine. Treatment may require removal of all or part of the colon (colectomy).
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