Dalziel first described Crohn’s disease in Scotland in isolated cases in 1913. However, in 1932, Crohn and colleagues working in New York described further cases affecting the small bowel and named the disease regional ileitis. This was later changed to regional enteritis when, it was realised that the disease could also affect other areas of the gut apart from the small intestine. Somewhere along the line doctors started to refer to it as Crohn’s disease, probably because it is less of a mouthful than regional enteritis.
Crohn’s is a chronic inflammatory disease, which can affect the whole of the alimentary tract from mouth to anus. The inflammation extends through all layers of the gut wall (transmural) and is characteristically patchy in distribution (skip lesions) with areas of normal tissue between areas of inflammation.
The most commonly affected sites are the terminal ileum (the lower part of the small intestine), and the first part of the large intestine (caecum and ascending colon). It frequently affects the anus.
The disease has several characteristics:
- The course of the disease is chronic with periods of remission, when patients are symptom-free, and relapses, when symptoms flare up (such flares are much less likely when the disease is well-controlled on diet).
- It has a wide range of symptoms.
- Complications outside the intestine are frequent.
- There is a strong tendency for it to recur after surgery.
In this section
- Bacteria and Viruses associated with Crohn’s disease To date no microbe has been identified as the cause of Crohn’s Disease (CD). The bacteria living in the intestine are…
- Cancer and Crohn’s disease The cause of cancer in the intestine is unknown despite extensive and continuing research. Patients with Crohn’s disease…
- Complications of Crohn’s Disease Aphthous Ulceration Aphthous Ulcers are small, white, superficial lesions with a reddened margin. They are usually…
- Drug Treatment Drugs in common use are here listed in alphabetical order for ease of reference. Acetarsol Suppositories What is…
- Investigations into Crohn’s Disease Investigations are necessary to reach the correct diagnosis and to check on the progress of the disease. After an…
- Diet & nutrition In Crohn's disease, diet can be a treatment in its own right, not just a way to ease symptoms. These pages explain the…
- Smoking and Crohn’s Disease Many studies have shown that there is an association between smoking and the development of Crohn’s disease (CD) and…
- Surgery in Crohn’s disease As Crohn’s disease (CD) may affect any part of the gut, surgery is rarely curative. Careful endoscopic follow-up shows…
- The Symptoms of Crohn’s Disease The symptoms of Crohn’s disease (CD) vary according to its site, (i.e. small or large intestine) and severity. However,…