Common site of regional enteritis is ?
Colon
Rectum
Distal ileum and colon
Caecum
Ans. is 'c' i.e., Distal ileum and colon Crohn disease (Terminal ileitis or regional enteritis) Crohn disease (CD) is an inflammatory bowel disease (IBD) which is characterized by ? 1) Sharply delimited and typically transmural involvement of the bowel by an inflammatory process with mucosal damage. 2) The presence of non caseating granulomas. 3) Fissuring with formation of fistula. o Any poion of intestine can be involved but most commonly small intestine is involved. Small intestine --> 40% Small intestine + colon --> 30% Colon --> 30%