title: Endometrioid adenocarcinoma arising from colonic endometriosis mimicking primary colonic carcinoma.
abstract: The clinicopathologic features of a case of endometrioid adenocarcinoma arising from colonic endometriosis that clinically and histologically mimicked a primary colonic carcinoma are reported. The differential diagnostic features of the tumor leading to the correct diagnosis included associated endometriosis, a minor mucosal component, focal squamous differentiation, absence of dirty necrosis, low nuclear grade, absence of a colonic adenoma, and a CK7+/CK20-/CEA- immunophenotype.
authors.affiliation: Department of Pathology, Saint Agnes Medical Center, Fresno, California 93720, USA.
authors.forename: Karl T K
authors.initials: KT
authors.lastname: Chen
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology; D000368:Aged; D000369:Aged, 80 and over; D002272:Carcinoembryonic Antigen / Q000096:biosynthesis; D018269:Carcinoma, Endometrioid / Q000209:etiology* / Q000378:metabolism / Q000473:pathology*; D003108:Colonic Diseases / Q000150:complications* / Q000378:metabolism / Q000473:pathology*; D003110:Colonic Neoplasms / Q000209:etiology* / Q000378:metabolism / Q000473:pathology*; D003937:Diagnosis, Differential; D004715:Endometriosis / Q000150:complications* / Q000378:metabolism / Q000473:pathology*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007381:Intermediate Filament Proteins / Q000096:biosynthesis; D053554:Keratin-20; D053552:Keratin-7; D007633:Keratins / Q000096:biosynthesis
chemical_list: D002272:Carcinoembryonic Antigen; D007381:Intermediate Filament Proteins; C507499:KRT20 protein, human; C507497:KRT7 protein, human; D053554:Keratin-20; D053552:Keratin-7; D007633:Keratins