PAX8 Expression in Breast Cancer
Autor: | Jesse Hart, Evgeny Yakirevich, Lijuan Wang, Yihong Wang, Shaolei Lu |
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Rok vydání: | 2020 |
Předmět: |
Adult
0301 basic medicine Pathology medicine.medical_specialty Histology medicine.drug_class Breast Neoplasms Monoclonal antibody Pathology and Forensic Medicine PAX8 Transcription Factor 03 medical and health sciences 0302 clinical medicine Breast cancer Histologic grade Biomarkers Tumor Humans Medicine Aged Aged 80 and over Tissue microarray Invasive carcinoma business.industry Middle Aged medicine.disease Immunohistochemistry Neoplasm Proteins Staining Gene Expression Regulation Neoplastic Medical Laboratory Technology 030104 developmental biology 030220 oncology & carcinogenesis Female PAX8 business |
Zdroj: | Applied Immunohistochemistry & Molecular Morphology. 29:293-298 |
ISSN: | 1541-2016 |
Popis: | PAX8 expression is frequently detected in renal, thyroidal, and Müllerian carcinomas, and PAX8 immunohistochemistry is often used to confirm the origin of these tumors. Tumors metastatic to the breast may masquerade as primary breast lesions. PAX8 is strongly expressed in tumors of Müllerian origin and largely negative in breast primaries, but an immunohistochemical expression of PAX8 in breast cancer has not been systematically evaluated in a large series. We analyzed 266 cases of invasive carcinoma of the breast on tissue microarrays and whole tissue sections with a PAX8 monoclonal antibody. Both the extent (focal or diffuse) and intensity (weak, moderate, or strong) of nuclear staining were assessed in the tumor cells. In total, 16 cases (6.02%) were positive for PAX8 (12 with weak and 4 with moderate staining). Expression was diffuse in 7 cases and focal in 9 cases. All 16 PAX8-positive tumors were histologic grade III invasive ductal carcinomas, 13 of these were triple-negative, 2 were HER2-positive, only and 1 was progesterone receptor-positive only. Strong PAX8 nuclear expression was not seen in any of the cases. PAX8 was negative in breast tumors with neuroendocrine features. Our study demonstrated a low rate of PAX8 expression in breast cancer. When present, PAX8 expression was only seen in high-grade invasive ductal carcinomas, mostly triple-negative. The presence of PAX8 immunoreactivity alone cannot exclude mammary origin, especially when only weak to moderate staining is observed, so the correlation with available clinical and pathologic data helps to ensure an accurate diagnosis. |
Databáze: | OpenAIRE |
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