Histology of Crohn's Syndrome.

The term 'Crohn's syndrome' is preferred to that of Crohn's disease as this is a condition of unknown, single, or possibly multiple aetiology. There are a large number of synonyms, including terminal ileitis, regional ileitis, regional or segmented colitis. It affects ileum or colon, alone or in combination. The disease manifests itself by well-demarcated areas of thickened bowel, stenosis, often by adhesions, frequently by local lympho-adenopathy, and sometimes by fistulae. It frequently occurs in, but is not confined to, young adults. It is further characterized by a tendency to relapse and to take a chronic course but is seldom fatal.