Stained caecum. Endoscopic view of the darkly stained (pigmented) surface of the caecum in a patient with melanosis coli. The caecum is a pouch connec

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Stained caecum. Endoscopic view of the darkly stained (pigmented) surface of the caecum in a patient with melanosis coli. The caecum is a pouch connected to the ascending colon, and is considered to be the beginning of the large intestine. The opening to the appendix can also be seen (centre). Melanosis coli is caused by prolonged use (or abuse) of laxative drugs, used to treat constipation. These drugs contain Anthraquinone, a pigment extracted from coal tar, which stains the lining of the colon. The condition is benign and reversible.

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Size: 3148px × 2811px
Photo credit: © GASTROLAB/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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