Abstract:
: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-inactivation of the SMARCB1 (INI-1) tumor suppressor gene. To date, only 16 cases of SMARCB1 (INI-1) 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-year-old 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-1) tumor suppressor gene by immunohistochemistry. In summary, the cytomorphologic features of SMARCB1 (INI-1) 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;44:700-703. © 2016 Wiley Periodicals, Inc.
journal_name
Diagn Cytopatholjournal_title
Diagnostic cytopathologyauthors
Allison DB,Bishop JA,Ali SZdoi
10.1002/dc.23503subject
Has Abstractpub_date
2016-08-01 00:00:00pages
700-3issue
8eissn
8755-1039issn
1097-0339journal_volume
44pub_type
杂志文章abstract::Chordoma is an uncommon tumor initially believed to be benign due to the rarity of its metastasis. Cytological, morphological, and immunohistochemical features of chordoma, relating to its origin from notochordal remnants, allows for its accurate diagnosis. A 75-year-old man with a known history of tuberculosis (TB) p...
journal_title:Diagnostic cytopathology
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journal_title:Diagnostic cytopathology
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journal_title:Diagnostic cytopathology
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doi:10.1002/dc.2840100313
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journal_title:Diagnostic cytopathology
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journal_title:Diagnostic cytopathology
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journal_title:Diagnostic cytopathology
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journal_title:Diagnostic cytopathology
pub_type: 杂志文章
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journal_title:Diagnostic cytopathology
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journal_title:Diagnostic cytopathology
pub_type: 杂志文章
doi:10.1002/dc.2840130413
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journal_title:Diagnostic cytopathology
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pub_type: 杂志文章
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journal_title:Diagnostic cytopathology
pub_type: 杂志文章
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journal_title:Diagnostic cytopathology
pub_type: 杂志文章
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journal_title:Diagnostic cytopathology
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journal_title:Diagnostic cytopathology
pub_type: 杂志文章
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journal_title:Diagnostic cytopathology
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journal_title:Diagnostic cytopathology
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journal_title:Diagnostic cytopathology
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