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. 2014 Jul 1;12:199. doi: 10.1186/1477-7819-12-199

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Copyright © 2014 Chai et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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CT of the sinonasal small-cell neuroendocrine carcinoma of Case 1. a) Noncontrast axial CT showing a soft-tissue mass in the right maxillary sinus involving the right nasal cavity, right ethmoid sinus, and sphenoid sinus. b) Contrast-enhanced CT showing that the lesion was strongly enhanced.