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Crohn's Disease

With Crohn's Disease the inflammation can extend through the entire thickness of the intestinal wall and can cause:

  • Narrowed areas of the bowel (strictures)
  • Micro perforations
  • Tunnels between sections of the bowel or the bowel and other organs (fistulae)
  • Areas of healthy bowel separated by patches of disease (the healthy areas known as skip lesions

Symptoms of Crohn's disease include:

  • Diarrhea
  • Abdominal pain
  • Rectal bleeding
  • Anorexia
  • Weight loss

Crohn's Disease can occur in any part of the gastrointestinal tract, from the mouth to the anus. It usually occurs towards the end of the small intestine and the colon.

The five types of Crohn's disease are based on the location within the gastrointestinal tract:

  • Gastroduodenal Crohn's Disease - affecting the stomach and the beginning of the small intestine
  • Jejunoileitis - affecting the jujunum
  • Ileitis - affecting the ileum
  • Ileocolitis - affecting the ileum and colon
  • Crohn colitis - affecting only the colon

View CT image of acute Crohn's Disease with obstruction (Warning: medical image)

Acute Crohns Disease with obstruction

View pictures of normal gut and Crohn's Disease (Warning: medical images)

Normal illium Normal Illium
Normal rectum and anus Normal rectum and anus
Crohns Disease - longitudinal ulceration Crohn's Disease - longitudinal ulceration
Crohns Disease - longitudinal ulceration Crohn's Disease - longitudinal ulceration
Crohns rectum, less involved Crohn's rectum, less involved
Crohns Disease, ulceration of sigmoid colon Crohn's Diesease, ulceration of sigmoid colon

Hints for health: Predicting a flare up is not possible, but early recognition of symptoms and consultation with your doctor results in a better response to treatment.


If you are interested in other gastrointestinal-focused information and intervention websites developed and hosted at
Swinburne University of Technology,
please go to:

IBSclinic.org.au for individuals with Irritable Bowel Syndrome

Gastroparesisclinic.org for individuals with Gastroparesis


This website and its content is not intended or recommended as a substitute for medical advice, diagnosis or treatment. Always seek advice of your own physician or other qualified health care professional regarding any medical questions or conditions.

© 2014 Swinburne University of Technology | CRICOS number 00111D