The diagnostic significance of trophoblast cell-surface antigen-2expression in benign and malignant thyroid lesions

Sadullahoglu C., Sayiner A., Suren D., Yildirim H. T., Nergiz D., Sezer C., ...More

INDIAN JOURNAL OF PATHOLOGY AND MICROBIOLOGY, vol.62, no.2, pp.206-210, 2019 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 62 Issue: 2
  • Publication Date: 2019
  • Doi Number: 10.4103/ijpm.ijpm_202_18
  • Journal Name: INDIAN JOURNAL OF PATHOLOGY AND MICROBIOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.206-210
  • Keywords: Follicular neoplasm, thyroid carcinoma, TROP-2, TROP-2 EXPRESSION, HBME-1 EXPRESSION, CARCINOMA, GALECTIN-3, CANCER, CK19
  • Akdeniz University Affiliated: Yes

Abstract

Context: Thyroid cancers are the most common malignancy of the endocrine system. Over-expression of trophoblast cell-surface antigen 2 (TROP-2) in various tumors has been found to correlate with poor prognosis and aggressive tumor behavior. Aims: The aim of this study was to evaluateTROP-2 expression in thyroid neoplasms. Subjects and Methods: This study contained 152 cases, including 48 follicular nodular disease (FND), 29 follicular adenoma (FA), 57 papillary thyroid carcinoma (PTC), 12 follicular thyroid carcinoma (FTC), 3 medullary thyroid carcinoma (MTC), 2 poorly differentiated thyroid carcinoma (PDTC) and 1 undifferentiated thyroid carcinoma (UDTC). TROP-2 expression was investigated via immunohistochemistry in sections prepared from paraffin blocks of the cases. Results: The cases comprised 32 (21%) males and 120 (79%) females with a mean age of 46.8 years (range, 15-85 years). TROP-2 expression was observed in 74.6% of the malignant lesions of the thyroid except for medullary carcinoma, poorly differentiated and undifferentiated thyroid carcinoma. Immunoreactivity was 3.4% in FA, 41.7% of cases with FTC and 81.8% in PTC follicular variant (PTC fv). The difference between FA/FTC and FA/PTC follicular variant were both significant (P < 0.005, P < 0.001, respectively). There was no difference between FTC/PTC fv (P = 0.089). Conclusion: TROP-2 can be considered a useful marker for distinguishing PTC fv cases from follicular nodular disease and follicular adenoma cases because of its high sensitivity in the identification of papillary carcinomas of the thyroid.