Here, we report a case of NK/T-cell lymphoma involving the sinonasal region ... 1​Division of Pathology, Sijhih Cathay General Hospital, New Taipei City, Taiwan ... cells show readily discernible nuclear atypia with an irregular nuclear outline ...CaseReportsinPathology+JournalMenuPDFJournaloverviewForauthorsForreviewersForeditorsTableofContentsSubmitCaseReportsinPathology/2018/ArticleArticleSectionsOnthispageAbstractIntroductionCaseReportDiscussionAbbreviationsDisclosureConflictsofInterestAuthors’ContributionsReferencesCopyrightCaseReport|OpenAccessVolume2018|ArticleID6264810|https://doi.org/10.1155/2018/6264810Chih-YiLiu,Hui-ChihTsai,"ComparisonofDiagnosticCytomorphologyofNaturalKiller/T-CellLymphoma(NasalType)inConventionalSmears,Liquid-BasedPreparations,andHistopathology",CaseReportsinPathology,vol.2018,ArticleID6264810,7pages,2018.https://doi.org/10.1155/2018/6264810ShowcitationComparisonofDiagnosticCytomorphologyofNaturalKiller/T-CellLymphoma(NasalType)inConventionalSmears,Liquid-BasedPreparations,andHistopathologyChih-YiLiu1,2andHui-ChihTsai11DivisionofPathology,SijhihCathayGeneralHospital,NewTaipeiCity,Taiwan2CollegeofMedicine,FuJenCatholicUniversity,NewTaipeiCity,TaiwanShowmoreAcademicEditor:MariaM.PickenReceived26Dec2017Accepted08Apr2018Published14May2018Naturalkiller(NK)/T-celllymphomaisformallyreferredtoasextranodalNK/T-celllymphoma,nasaltype(ENKTCL),inthe2008and2016WorldHealthOrganization(WHO)classifications.NK/T-celllymphoma,nasaltype,isararebutclinicallyimportantlymphoidneoplasm.ItisthepredominanttypeofextranodallymphomaassociatedwiththeEpstein–Barrvirus(EBV).NK/T-celllymphomaismarkedbyawidecytomorphologicalspectrum.ThecytologicalfindingsmaybesosubtlethatNK/T-celllymphomacouldpossiblybeeasilyoverlooked.Here,wereportacaseofNK/T-celllymphomainvolvingthesinonasalregionwithlymphnodeinvolvement.Fineneedleaspirationofthenecklymphnodeandpunchbiopsyofthenasalmucosawereperformed.ThediagnosisofNK/T-celllymphomawasconfirmedbasedonpathologicalandimmunohistochemic