Carcinoma of the small intestine associated with transmural ileitis (Crohn's disease).

A case of adenocarcinoma of the small bowel arising in pre-existing transmural ileitis (Crohn's disease) is reported and 28 previously reported cases are reviewed. Carcinoma associated with transmural enteritis occurs more often in the distal ileum, in younger patients, and in more males than expected from published data on carcinoma not associated with transmural enteritis. If the patient has had exclusion procedures, the carcinoma has been found to arise in the excluded bowel segment.