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Am J Surg Pathol. 1988 Aug;12(8):607-11.

Composite glandular-carcinoid tumors of the colon and rectum. Report of two cases.

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  • 1Department of Pathology, University Hospital, Saskatoon, Saskatchewan, Canada.


Composite glandular-carcinoid tumors of the large bowel are rare. We describe two cases that appeared to be at a relatively early stage in their development. Each of these cases was a composite colorectal adenoma-carcinoid--an entity that has not previously been described. There was no evidence of inflammatory bowel disease (IBD) in either of these cases; and a review of the literature on composite adenocarcinoma-carcinoid neoplasms of the colon and rectum revealed only two cases that arose in a background of IBD. Thus, despite the association of IBD, especially long-standing ulcerative colitis, with epithelial dysplasia and mucosal endocrine cell hyperplasia, respectively, we believe that other factors more significant than IBD may be operative in the genesis of composite glandular-carcinoid tumors of the large bowel. Further documentation of these tumors is needed in order to better appreciate their clinicopathologic manifestations and associations.

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