The patient tested positive for Bartonella henselae, the causative bacterium of cat​-scratch disease (bartonellosis). Antibiotic therapy resulted in ...×ArticlesLogInCasesSignUpCoursesQuizBlogDonateAbout×MenuSearchADVERTISEMENT:Radiopaediaisfreethankstooursupportersandadvertisers.BecomeaGoldSupporterandseenoads.ArticlesCasesCoursesLogInLoginSignup{"url":"/signup-modal-props.json?lang=us\u0026email="}ArticlesCasesCoursesQuizAboutBlogGoad-freeSearchCat-scratchdiseaseCasecontributedbyDrBalintBotz◉Diagnosiscertain  Diagnosiscertain PresentationPalpable,rapidlyappearingpainfulmassintheregionoftheleftelbow.Subfebrileuponpresentation.Catowner.PatientDataAge:60yearsGender:MaleFromthecase:Cat-scratchdiseaseX-rayLoadingimages...LoadingStack-0imagesremainingFrontalSoft-tissueswellingwithcircumscribednodularlesions(seerewindowedimage)intheareacorrespondingtothelocationoftheepitrochlearlymphnodes. Nobonyabnormality. Fromthecase:Cat-scratchdiseaseUltrasoundLoadingStack-0imagesremainingObliqueAnenlargedsuperficiallymphnodewiththickenedcortexisvisiblecorrespondingtothepalpablemass.Thelymphnodeshowsmarkedhypervascularity.Asimilarbutsmalleradditionallymphnodeisvisibleinitsproximity.Altogetherfindingsaresuggestiveofreactivelymphnodeenlargementmostlikelyduetoinfection. Fromthecase:Cat-scratchdiseaseMRILoadingimages...LoadingStack-0imagesremainingAxialT2Bothlymphnodesshowvividenhancement,andadjacentsofttissuestranding.Nobonyabnormality. CaseDiscussionThepatienttestedpositiveforBartonellahenselae,thecausativebacteriumofcat-scratchdisease(bartonellosis).Antibiotictherapyresultedinrapidrecovery. 1articlefeaturesimagesfromthiscaseCat-scratchdisease3publicplaylistsincludesthiscaseMedical_Imaging_2021MSKCODRarecaseRelatedRadiopaediaarticlesCat-scratchdiseasePromotedarticles(advertising)PlayAddtoShareViewrevisionhistoryReportproblemwithCaseContactuserCaseFullscreencaseCasewithhiddendiagnosisFullscreencasewithhiddendiagnosis+addtonewplaylistCaseinformationrID:77817Published:22ndMay2020Lastedite