Evaluation of PAX2 and PAX8 Expression in Salivary Gland Neoplasms

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• 作者：Randall T. Butler ; Megan A. Alderman ; Lester D. R. Thompson…
• 关键词：Salivary gland neoplasms ; PAX2 ; PAX8
• 刊名：Head and Neck Pathology
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：9
• 期：1
• 页码：47-50
• 全文大小：518 KB
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• 刊物主题：Pathology; Otorhinolaryngology; Oral and Maxillofacial Surgery; Dentistry;
• 出版者：Springer US
• ISSN：1936-0568

文摘

PAX2 and PAX8 are transcription factors involved in embryogenesis that have been utilized as immunohistochemical indicators of tumor origin. Specifically, PAX2 is a marker of neoplasms of renal and müllerian origin, while PAX8 is expressed by renal, müllerian, and thyroid tumors. While studies examining these transcription factors in a variety of tumors have been published, data regarding their expression in salivary gland neoplasms are limited. The goal of this study was to assess expression of PAX2 and PAX8 in a large cohort of salivary gland tumors. Utilizing tissue microarrays, samples of normal salivary glands (n?=?68) and benign and malignant salivary gland neoplasms (n?=?442) were evaluated for nuclear immunoreactivity with PAX2 and PAX8. No expression was observed with either marker in the normal salivary glands, and PAX8 was negative in all neoplasms. Focal expression of PAX2 was observed in one example each of oncocytoma and acinic cell carcinoma. These results indicate that evaluation of PAX2 and/or PAX8 expression would be valuable in differentiating primary salivary gland tumors from metastases known to express PAX2 and/or PAX8.