Going beyond "Basaloid neoplasm": Fine needle aspiration cytology of epithelial-myoepithelial carcinoma of the parotid gland

Epithelial‐myoepithelial carcinoma (EMC) is a rare salivary gland malignancy with variable cytologic findings. Its rarity, variable morphologic findings, and similarities with more common salivary gland entities make it a difficult cytologic diagnosis. As the name signifies, the key feature of this...

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Bibliographic Details
Published in:Diagnostic cytopathology 2016-05, Vol.44 (5), p.422-425
Main Authors: Molnar, Stacy L., Zarka, Matthew A., De Las Casas, Luis E.
Format: Article
Language:English
Subjects:
Biopsy, Fine-Needle
Carcinoma - pathology
Cell Nucleus - pathology
Cytoplasm - pathology
epithelial-myoepithelial carcinoma
Female
fine needle aspiration
Humans
Middle Aged
parotid
Parotid Neoplasms - pathology
salivary gland neoplasms
Stromal Cells - pathology
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Summary:Epithelial‐myoepithelial carcinoma (EMC) is a rare salivary gland malignancy with variable cytologic findings. Its rarity, variable morphologic findings, and similarities with more common salivary gland entities make it a difficult cytologic diagnosis. As the name signifies, the key feature of this tumor is presence of an epithelial and myoepithelial component. However, when one of these two components is scant on the fine needle aspiration (FNA) smears, it may be overlooked. We present a case from a 62 year‐old female who presented to the clinic with a parotid nodule and episodes of sharp, throbbing pain. A fine needle aspiration was performed which revealed a highly cellular specimen comprised primarily of aggregates of cells with small, round nuclei and scant to absent cytoplasm. Abundant hyaline stromal material was also noted. The case was signed out as basaloid neoplasm with a recommendation for surgical resection. The subsequent resection specimen revealed EMC. By reviewing the FNA specimen following the surgical resection of the tumor, we were able to utilize the benefit of hindsight to more clearly identify the subtle, biphasic components of the tumor. Diagn. Cytopathol. 2016;44:422–425. © 2016 Wiley Periodicals, Inc.
ISSN:8755-1039
1097-0339
DOI:10.1002/dc.23434