Crohn’s disease


A chronic inflammatory disease, primarily involving the small and large intestine, but which can affect other parts of the digestive system as well. It is named for Burrill Crohn, the American gastroenterologist who first described the disease in 1932.

Crohn disease is usually diagnosed in persons in their teens or twenties, but can come to the fore at any point in life. It can be a chronic, recurrent condition or can cause minimal symptoms with or even without medical treatment.

In mild forms, Crohn disease causes small scattered shallow crater- like areas (erosions) called aphthous ulcers in the inner surface of the bowel. In more serious cases, deeper and larger ulcers can develop, causing scarring and stiffness and possibly narrowing of the bowel, sometimes leading to obstruction. Deep ulcers can puncture holes in the bowel wall, leading to infection in the abdominal cavity (peritonitis) and in adjacent organs.

Crohn disease comes in many forms. Involvement of the large intestine (colon) only is called Crohn colitis or granulomatous colitis, while involvement of the small intestine alone is called Crohn enteritis. The most common part of the small intestine to be affected by Crohn disease is the last portion, called the ileum. Active disease in this area is termed Crohn ileitis. When both the small intestine and the large intestine are involved, the condition is called Crohn enterocolitis (or ileocolitis). Other descriptive terms may be used as well.

Abdominal pain, diarrhea, vomiting, fever, and weight loss are common symptoms. Crohn disease can be associated with reddish tender skin nodules, and inflammation of the joints, spine, eyes, and liver. Diagnosis is commonly made by x-ray or colonoscopy. Treatment includes medications that are anti-inflammatories, immune suppressors or antibiotics. Surgery can be necessary in severe cases.

Genetic factors contribute to the causation of Crohn disease. One of the genes has been shown to be on chromosome 14 in region 14q11-12.

Read Also:

  • Cross training

    Cross training: Doing two or more aerobic activities such as jogging, bicycling, and swimming on a regular basis.

  • Cross-section

    Cross-section: In anatomy, a transverse cut through a structure or tissue. The opposite is longitudinal section.

  • Cross-sectional study

    Cross-sectional study: A research study done at one time, not over the course of time. A cross-sectional study might be a study of a disease such as AIDS at one point in time, to learn its prevalence and distribution within the population. Also known as a synchronic study.

  • Crossed embolism

    Crossed embolism: Passage of a clot (thrombus) from a vein to an artery. When clots in veins break off (embolize) , they travel first to the right side of the heart and, normally, then to the lungs where they lodge. The lungs act as a filter to prevent the clots from entering the arterial circulation. […]

  • Crossing over

    Crossing over: Exchanging genetic material between two paired chromosomes. Crossing over is a way to recombine the genetic material so that each person (except for identical twins) is genetically unique.


Disclaimer: Crohn's disease definition / meaning should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. All content on this website is for informational purposes only.