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Nasal polyp
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===Differential diagnosis=== Other disorders can mimic the appearance of nasal polyps and should be considered if a mass is seen on exam.<ref>{{Cite web |title=Nasal polyps - Symptoms, diagnosis and treatment {{!}} BMJ Best Practice US |url=https://bestpractice.bmj.com/topics/en-us/1130 |access-date=2024-11-19 |website=bestpractice.bmj.com |language=en-us}}</ref> Examples include [[encephalocele]], [[glioma]], [[inverted papilloma]], and cancer.<ref name="Fer2017" /> Early biopsy is recommended for unilateral nasal polyps to rule out more serious conditions such as cancer, [[inverted papilloma]], or [[fungal sinusitis]].<ref name=Murr2016/> <gallery mode=packed heights=170> File:Histopathology of sinonasal inflammatory polyp with mixed inflammation, annotated.jpg|Benign mixed inflammation of an inflammatory nasal polyp. File:Histopathology of extranodal NK-T cell lymphoma, nasal type.png|[[Extranodal NK/T cell lymphoma, nasal type]] for comparison.<ref>{{Cite journal |last=Takahara M, Kumai T, Kishibe K, Nagato T, Harabuchi Y |year=2021 |title=Extranodal NK/T-Cell Lymphoma, Nasal Type: Genetic, Biologic, and Clinical Aspects with a Central Focus on Epstein-Barr Virus Relation. |journal=Microorganisms |volume=9 |issue=7 |page=1381 |doi=10.3390/microorganisms9071381 |pmc=8304202 |pmid=34202088 |doi-access=free}}<br />- "This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/)."</ref> These lymphoma cells are typically monotonous, with folded nuclei, indistinct nucleoli and moderate amount of cytoplasm.<ref>{{Cite web |last=Mario L. Marques-Piubelli, M.D., Carlos A. Torres-Cabala, M.D., Roberto N. Miranda, M.D. |title=Extranodal NK / T cell lymphoma, nasal type |url=https://www.pathologyoutlines.com/topic/lymphomanonBnasal.html |website=Pathology Outlines}} Last author update: 5 January 2021. Last staff update: 14 October 2021</ref> </gallery>
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