a morphologic , histochemical , and immunocytochemical study of 20 cases of pure gastrointestinal carcinoids , adenocarcinomas , and mixed neoplasms composed of both elements , so-called composite carcinoma-carcinoid tumors ( ccc ) , was undertaken in order to correlate the morphologic patterns with the immunocytochemical localization of carcinoembryonic antigen ( cea ) , serotonin , and a battery of polypeptide hormones ( calcitonin , glucagon , insulin , gastrin , somatostatin , and adrenocorticotropin [ acth ] ) .
C0001418
adenocarcinomas
C0037659
somatostatin