title: Expression of galectin-3, cytokeratin 19, neural cell adhesion molecule and E-cadhedrin in certain variants of papillary thyroid carcinoma.
abstract: The immunohistochemical expression of galectin-3 (Gal3), cytokeratin 19 (CK19), neural cell adhesion molecule (NCAM), and E-cadherin (Ecad) was evaluated to assess their use in diagnostics of papillary thyroid carcinoma (PTC). A total of 84 PTCs - 36 classical variants (cPTCs), 26 follicular variants (fPTCs), and 22 papillary microcarcinomas (mPTCs) were studied. Expression of Gal3 was found in 36/36 (100%) cPTCs, 24/26 (92%) fPTCs, and 19/22 (86%) mPTCs. CK19 expression was detected in 34/36 (94%) cPTCs, 17/26 (65%) fPTCs, and 13/22 (59%) mPTCs. Expression of NCAM was seen in 5/36 (14%) cPTCs, 7/26 (27%) fPTCs, and 9/22 (41%) mPTCs. Ecad expression was found in 23/36 (64%) cPTCs, 17/26 (65%) fPTCs, and 18/22 (82%) mPTCs. A significant difference in CK19 expression was observed between cPTC and both fPTC and mPTC (p < 0.001). Furthermore, extrathyroid tumor spread significantly correlated with both level of CK19 expression and loss of Ecad expression (p = 0.001, p = 0.04). Our findings suggest that Gal3 and CK19 are useful markers for PTC, although decreased CK19 expression in mPTC and fPTC must be considered. Furthermore, CK19 and Ecad may play a role in extrathyroid tumor spread.
authors.affiliation: The Fingerland Department of Pathology, Charles University Faculty of Medicine and Faculty Hospital in Hradec Králové. lacoj@lfhk.cuni.cz
authors.forename: J
authors.initials: J
authors.lastname: Laco
authors.forename: A
authors.initials: A
authors.lastname: Ryska
authors.forename: J
authors.initials: J
authors.lastname: Cáp
authors.forename: P
authors.initials: P
authors.lastname: Celakovský
mesh_terms: D000231:Adenocarcinoma, Papillary / Q000737:chemistry*; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000032:analysis*; D015820:Cadherins / Q000032:analysis*; D018265:Carcinoma, Papillary, Follicular / Q000737:chemistry*; D005260:Female; D037502:Galectin 3 / Q000032:analysis*; D006801:Humans; D053539:Keratin-19 / Q000032:analysis*; D008297:Male; D008875:Middle Aged; D019006:Neural Cell Adhesion Molecules / Q000032:analysis*; D013964:Thyroid Neoplasms / Q000737:chemistry*; D055815:Young Adult
chemical_list: D014408:Biomarkers, Tumor; D015820:Cadherins; D037502:Galectin 3; D053539:Keratin-19; D019006:Neural Cell Adhesion Molecules