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  • Title: Primary carcinoids of the ileum and rectum. A simultaneous occurrence.
    Author: Colbert PM.
    Journal: JAMA; 1976 Nov 08; 236(19):2201-3. PubMed ID: 989813.
    Abstract:
    A patient had a simultaneous occurrence of an ileal and a rectal carcinoid. The ileal carcinoid, occurring in an area derived from primitive midgut, was argentaffin-positive; the rectal carcinoid, occurring in an area derived from primitive hindgut, was argentaffin-negative. To my knowledge, this is the first reported case of simultaneous ileum and rectal carcinoids; its uniqueness tends to support the concept of heterogeneity of origin of carcinoids in embryologically distinct regions.
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