CD99-, CD34-, bcl2- (J Cancer Res Ther 2010;6:388). Sarcomatoid renal cell carcinoma: Infiltrative, atypical spindle cells, usually typical renal cell carcinoma ...AuthorsBlogBoardReviewCommentContactUsNewslettersStatisticsTestimonialsSeeElsevier'snewvideoabouttheirClinicReviewArticlesonourhomepageorclickhere.JobsFellowshipsConferences/WebinarsBooksCMECasesAdvertiseGrantsMedicalNewsLibrariesRocheCompanionDiagnosticLibraryRocheNTRKIHCDiagnosticLibraryCOVID-19LibraryPandemicreliefmusicawardHome>Kidneytumor>SolitaryfibroustumorKidneytumorBenignadulttumorsSolitaryfibroustumorAuthor: MandolinS.Ziadie,M.D.TopicCompleted:1March2012Minorchanges:15March2021Copyright:2003-2021,PathologyOutlines.com,Inc.PubMedSearch:"Solitaryfibroustumor"kidneyPageviewsin2020:1,151Pageviewsin2021todate:404TableofContentsDefinition/general|Epidemiology|Clinicalfeatures|Casereports|Treatment|Grossdescription|Grossimages|Microscopic(histologic)description|Microscopic(histologic)images|Positivestains|Negativestains|Electronmicroscopydescription|DifferentialdiagnosisCitethispage:ZiadieMS.Solitaryfibroustumor.PathologyOutlines.comwebsite.https://www.pathologyoutlines.com/topic/kidneytumorsolitary.html.AccessedApril13th,2021.Definition/generalBenign(90%)tumorofpatternlessorstoriformspindlecellswithblandnuclearfeatures,mixedwithdensecollagenSeealsoSofttissuetumorchapterEpidemiologyRareinkidney,arisesfromserosalsurfacesofpleuraandothersitesClinicalfeaturesMaybeassociatedwithhypoglycemia(EurUrol2009;55:739,AnnThoracSurg2007;84:292)Casereports26yearoldmanwithsolitaryfibroustumoroftherightkidney(CanJUrol2007;14:3583)39yearoldwomanwithgiant(20cm)tumor(HinyokikaKiyo2010;56:435)48yearoldwomanwithcapsulartumor(AmJSurgPathol1996;20:1288)50yearoldwomanwithmalignantcomponent(DiagnPathol2011;6:96)52yearoldwomanwithlargesolitaryfibroustumoroftherightkidney(UrolAnn2011;3:158)76yearoldmanwithmalignanttumor(ArchPatholLabMed2006;130:857)85yearoldwomanwithrenalhilarmass(ArchPatholLabMed2006;130:117)TreatmentExcisionAlm