{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T01:51:51Z","timestamp":1783389111657,"version":"3.54.6"},"reference-count":15,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2016,5,14]],"date-time":"2016-05-14T00:00:00Z","timestamp":1463184000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Diagnostic Cytopathology"],"published-print":{"date-parts":[[2016,8]]},"abstract":"<jats:p>Tumors of the head and neck are extremely diverse and a subset are poorly differentiated and difficult to classify. Recently, a new entity has been described with rhabdoid and\/or plasmacytoid cytologic features and a characteristic genetic signature\u2014inactivation of the SMARCB1 (INI\u20101) tumor suppressor gene. To date, only 16 cases of SMARCB1 (INI\u20101) deficient sinonasal carcinoma have been described, and there are currently no reports of the cytopathologic features by fine needle aspiration (FNA) cytology. A case of a 77\u2010year\u2010old man who presented with a posterior ethmoid sinus lesion with invasion into the skull base and bone was reported. FNA cytology of a right retropharyngeal lymph node revealed relatively monomorphic, loosely cohesive clusters of plasmacytoid cells with occasional nucleoli, rare intranuclear cytoplasmic inclusions, and mitotic figures in a background of necrosis and absence of overt squamous or glandular differentiation. A diagnosis of metastatic myoepithelial carcinoma was made; however, retrospectively, the surgical excision showed loss of the SMARCB1 (INI\u20101) tumor suppressor gene by immunohistochemistry. In summary, the cytomorphologic features of SMARCB1 (INI\u20101) deficient sinonasal carcinoma are relatively nonspecific and overlap with other regional tumors, including myoepithelial neoplasms. As a result, this entity should be considered in the differential diagnosis for a plasmacytoid tumor arising in the sinonasal tract by FNA cytology. Diagn. Cytopathol. 2016;44:700\u2013703. \u00a9 2016 Wiley Periodicals, Inc.<\/jats:p>","DOI":"10.1002\/dc.23503","type":"journal-article","created":{"date-parts":[[2016,5,14]],"date-time":"2016-05-14T06:36:47Z","timestamp":1463207807000},"page":"700-703","source":"Crossref","is-referenced-by-count":24,"title":["Cytopathologic characteristics of SMARCB1 (INI\u20101) deficient sinonasal carcinoma: A potential diagnostic pitfall"],"prefix":"10.1002","volume":"44","author":[{"given":"Derek B.","family":"Allison","sequence":"first","affiliation":[{"name":"Department of Pathology The Johns Hopkins University School of Medicine Baltimore Maryland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Justin A.","family":"Bishop","sequence":"additional","affiliation":[{"name":"Department of Pathology The Johns Hopkins University School of Medicine Baltimore Maryland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Syed Z.","family":"Ali","sequence":"additional","affiliation":[{"name":"Department of Pathology The Johns Hopkins University School of Medicine Baltimore Maryland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2016,5,14]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.nec.2012.08.004"},{"key":"e_1_2_6_3_1","volume-title":"World health organization classification of tumours. 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