Laxative Abuse and The Colon

The New England Journal of Medicine showed this appearance of the inside walls of a colon found on colonoscopy. The answer to the image challenge, of course, is laxative use. (click on the photo to see up close). The 2nd image shows the appearance of a normal colon. Note the pink skin and the normal folds which are quite different in appearance than the first image. Laxative abuse causes a