Abstract
More than 15 years ago, seminal studies by Dr. E. Leon Barnes and colleagues transformed our understanding of salivary duct carcinoma (SDC) and, in doing so, paved the way for contemporary diagnostic and therapeutic approaches to this aggressive salivary adenocarcinoma. In particular, attention to the apocrine phenotype of SDC and expression of androgen receptor (AR) by immunohistochemistry has improved the diagnostic accuracy and showed how SDC can be reliably distinguished from its morphologic mimics (i.e., other salivary gland carcinomas with high grade transformation, low grade cribriform cystadenocarcinoma, and squamous cell carcinomas involving parotid). Furthermore, the observation that SDC shares AR expression with prostate cancer and apocrine breast cancer foresaw the discovery of common molecular alterations between SDC and these tumor types and draw attention to androgen deprivation therapy for SDC patients.
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Acknowledgements
The authors wish to thank members of the Developmental Laboratory of the Department of Pathology, University of Pittsburgh, for excellent technical support, and Robyn Roche for outstanding secretarial support.
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Proceedings of the 2017 North American Society of Head and Neck Pathology Companion Meeting (San Antonio, TX).
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Udager, A.M., Chiosea, S.I. Salivary Duct Carcinoma: An Update on Morphologic Mimics and Diagnostic Use of Androgen Receptor Immunohistochemistry. Head and Neck Pathol 11, 288–294 (2017). https://doi.org/10.1007/s12105-017-0798-x
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DOI: https://doi.org/10.1007/s12105-017-0798-x