Fast Five Quiz: Test Yourself on Crohn Disease

Jamie Shalkow, MD


March 13, 2017

Studies have found compelling evidence of an inheritable risk for the development of Crohn disease. However, classic Mendelian inheritance is not seen.

Smoking has been shown to double the risk for Crohn disease, whereas the risk of developing ulcerative colitis is lower in people who smoke than in those who have never smoked or in those who stopped smoking before their diagnosis. Although appendectomy has been suggested to be protective in ulcerative colitis, it is not a protective factor in Crohn disease.

For more on the etiology of Crohn disease, read here.


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