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Crohn's disease (also known as regional enteritis) is a chronic, episodic, inflammatory condition of the gastrointestinal tract characterized by transmural inflammation (affecting the entire wall of the involved bowel) and skip lesions (areas of inflammation with areas of normal lining in between). Crohn's disease is a type of inflammatory bowel disease (IBD) and may sometimes affect any part of the gastrointestinal tract from mouth to anus; as a result, the symptoms of Crohn's disease can vary between affected individuals. The main gastrointestinal symptoms are abdominal pain, diarrhea, which may be bloody, and weight loss. Crohn's disease can also cause complications outside of the gastrointestinal tract such as skin rashes, arthritis, and inflammation of the eye. (More...)