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Simultaneous immunohistochemical expression of HBME‐1 and galectin‐3 differentiates papillary carcinomas from hyperfunctioning lesions of the thyroid
Author(s) -
Rossi E D,
Raffaelli M,
Mule' A,
Miraglia A,
Lombardi C P,
Vecchio F M,
Fadda G
Publication year - 2006
Publication title -
histopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.626
H-Index - 124
eISSN - 1365-2559
pISSN - 0309-0167
DOI - 10.1111/j.1365-2559.2006.02428.x
Subject(s) - pathology , medicine , immunohistochemistry , differential diagnosis , cytokeratin , thyroid carcinoma , thyroid , malignancy
Aims : The histological diagnosis is critical for the postsurgical management and follow‐up of thyroid malignancies. The differential diagnosis between papillary carcinoma and hyperfunctioning lesions, either with papillary hyperplasia or with a follicular architecture, can create real diagnostic difficulty. The aim of this study was to evaluate the expression of several antibodies considered to be markers of malignancy in malignant and hyperfunctioning thyroid neoplasms and to include the most effective of them in a diagnostic panel. Methods and results : One hundred resected thyroid nodules—58 hyperfunctioning benign lesions and 42 papillary carcinomas (14 follicular variant, 14 macrofollicular variant and 14 classic type)—were immunohistochemically studied for HBME‐1, galectin‐3, cytokeratin (CK) 19 and RET‐proto‐oncogene. HBME‐1 and galectin‐3 showed 92.8% and 89% sensitivity, respectively, and their coexpression was present in 36 out of 42 papillary carcinomas (85.7%) and absent in non‐malignant lesions. Their association increased sensitivity to 94.7% and the diagnostic accuracy to 97.9% and involved the highest number of cases (95%) in comparison with two other panels including, respectively, three (HBME‐1, galectin‐3, CK19) and all four antibodies. Conclusion : An immunohistochemical panel consisting of HBME‐1 and galectin‐3 can make a correct distinction between malignant and hyperfunctioning thyroid neoplasms with high diagnostic accuracy.