Crohn's disease, also known as Crohn syndrome and regional enteritis, is a chronic
inflammatory disease of the digestive tract. Most commonly, Crohn's affects the
small intestine and the beginning of the large intestine.
Abdominal pain, which is usually the initial symptom of Crohn's disease, often
is located in the right lower quadrant.
Crohn's disease is a relatively uncommon condition and can affect people of all
ages. The disease may begin gradually with periods of active symptoms and
periods of remissions.
The cause of Crohn's disease is unknown. However, the following factors have
been statistically associated with the cause:
• autoimmune reaction