Jerzy Klijanienko, Arnaud Gauthier, Hervé J. Brisse, Gaelle Pierron, Daniel Orbach
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Parotid Keratocystoma: Fine Needle Aspiration Cytomorphology With Ancillary Testing Results
Keratocystoma is a rare benign salivary gland tumor described in 1999. Only 14 cases have been reported in the histopathological literature, with three of them having had a preoperative fine needle aspiration (FNA) performed. All cytological diagnoses were not specific.
We have seen a 12-month-old boy presenting a left parotid mass with facial nerve paralysis. FNA showed the presence of numerous mature squamous cells and some calcifications. The corresponding core needle biopsy showed identical morphologic features with no signs of malignancy. MAML2 FISH was negative, but IRF2BP2/RUNX2 fusion transcript was detected, which confirmed the diagnosis of keratocystoma.
Despite its benign nature, keratocystoma should be differentiated from other salivary gland tumors such as Warthin's tumor with squamous cell metaplasia, mucoepidermoid carcinoma, primary vs. metastatic squamous cell carcinoma, and necrotizing sialometaplasia.
期刊介绍：
Diagnostic Cytopathology is intended to provide a forum for the exchange of information in the field of cytopathology, with special emphasis on the practical, clinical aspects of the discipline. The editors invite original scientific articles, as well as special review articles, feature articles, and letters to the editor, from laboratory professionals engaged in the practice of cytopathology. Manuscripts are accepted for publication on the basis of scientific merit, practical significance, and suitability for publication in a journal dedicated to this discipline. Original articles can be considered only with the understanding that they have never been published before and that they have not been submitted for simultaneous review to another publication.
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