Evaluation of E-Cadherin and β-Catenin Immunoreactivity for Determining Undifferentiated Cells in Anaplastic Thyroid Carcinoma.

Abstract

INTRODUCTION:

An immunohistochemical study has occasionally been performed to diagnose anaplastic thyroid carcinoma (ATC). However, antibodies to confirm the undifferentiated nature of ATC have not yet been evaluated. The aim of this study was to evaluate E-cadherin and β-catenin expressions in immunoreactivity to determine undifferentiated carcinoma cells in the diagnosis of ATC.

METHODS:

We immunohistochemically examined 29 ATCs, 30 poorly differentiated thyroid carcinomas (PDTCs), 22 well-differentiated thyroid carcinomas (WDTCs), and 3 squamous cell carcinomas. Antibodies for thyroid transcription factor-1 (TTF-1), paired-box gene 8 (PAX8), β-catenin, and E-cadherin were used.

RESULTS:

All WDTCs tested positive for TTF-1, PAX8, and E-cadherin. The positive rates of TTF-1, PAX8, and E-cadherin were 93.3, 93.3, and 100%, respectively, in PDTCs and 17.2, 51.7, and 10.3%, respectively, in ATCs. WDTC expressed the lateral cell membrane staining for β-catenin and E-cadherin, whereas PDTC showed circumferential cell membranous expression (fishnet pattern). β-catenin cell membrane expression in ATCs is lost or discontinuous. Carcinoma cells with β-catenin nuclear expression without cell membranous expression were scattered in 72.4% of ATCs but were not observed in the other carcinomas.

CONCLUSION:

We propose 3 immunohistochemical findings to determine undifferentiated carcinoma cells in the diagnosis of ATC: (1) β-catenin nuclear expression with no or reduced cell membranous expression, (2) the loss or discontinuous pattern of E-cadherin expression, and (3) the loss of PAX8 nuclear expression.

• Authors: Risa Kanematsu, Mitsuyoshi Hirokawa, Aki Tanaka, Ayana Suzuki, Miyoko Higuchi, Seiji Kuma, Toshitetsu Hayashi, Akira Miyauchi
• Journal: Pathobiology : journal of immunopathology, molecular and cellular biology (Pathobiology) Vol. 88 Issue 5 Pg. 351-358 ( 2021) ISSN: 1423-0291 [Electronic] Switzerland
• PMID: 34237735 (Publication Type: Journal Article)
• Copyright: © 2021 S. Karger AG, Basel.

Chemical References

• Biomarkers, Tumor
• CTNNB1 protein, human
• Cadherins
• beta Catenin

Topics

• Biomarkers, Tumor
• Cadherins (genetics, immunology)
• Carcinoma, Squamous Cell (genetics, immunology, metabolism)
• Humans
• Immunohistochemistry (methods, standards)
• Paraffin Embedding
• Thyroid Carcinoma, Anaplastic (genetics, immunology)
• Thyroid Gland (pathology)
• beta Catenin (genetics, immunology)