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Review
. 2016 Apr;38 Suppl 1:E2259-66.
doi: 10.1002/hed.24152. Epub 2015 Jul 18.

Neuroendocrine Neoplasms of the Sinonasal Region

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Review

Neuroendocrine Neoplasms of the Sinonasal Region

Diana Bell et al. Head Neck. .

Abstract

Neuroendocrine neoplasms of the sinonasal region, which are relatively uncommon but clinically very important, are reviewed here in the light of current knowledge. Using a definition for neuroendocrine based on phenotypic, histologic, immunohistochemical, and electron microscopic features rather than histogenetic criteria, sinonasal neuroendocrine carcinomas are examined with a particular emphasis on the small-cell and large-cell subtypes. This is followed by revisiting olfactory neuroblastoma because it is also a tumor that shows a neuroendocrine phenotype. Kadish clinical and Hyams histologic grading systems as prognosticators of olfactory neuroblastoma are also considered in detail. Finally, controversies regarding sinonasal undifferentiated carcinoma as a neuroendocrine tumor are discussed and a possible relationship with high-grade olfactory neuroblastoma is explored. Genetic events and current management of these tumors are also outlined. © 2015 Wiley Periodicals, Inc. Head Neck 38: E2259-E2266, 2016.

Keywords: immunohistochemistry; neuroendocrine neoplasms; olfactory neuroblastoma; sinonasal carcinoma; sinonasal undifferentiated carcinoma.

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