Choroid plexus papilloma (CPP) is a rare type of brain tumor. They are generally benign (not cancer). Benign also means that the growth does not spread to other ...SkiptocontentCedars-SinaiHealthLibraryChoroidPlexusPapillomaShareEmailPrintConditions&TreatmentsSymptomCheckerVideoLibraryPreventionGuidelinesHealthCalculatorsRiskAssessmentsChoroidPlexusPapillomaNotwhatyou'relookingfor?StartNewSearchABOUTCAUSESDIAGNOSISTREATMENTNEXTSTEPSWhatischoroidplexuspapilloma?Choroidplexuspapilloma(CPP)isararetypeofbraintumor.Theyaregenerallybenign(notcancer).Benignalsomeansthatthegrowthdoesnotspreadtootherpartsofthebody.CPPismostcommoninyoungchildren,butitcanalsoappearinadults.CPParegenerallyslow-growingtumors.Itisveryrareforthistypeoftumortospreadoutsidethebrain.InatypicalCPP,thetumorismorelikelytogrowfasterorcomebackaftertreatment.ACPPtumorgrowsinthechoroidplexus.Thisisalayeroftissuewithinthebrainthatmakesthecerebrospinalfluid(CSF).CSFsurroundsandcushionsthebrainandspinalcord.Thechoroidplexuslinestheventriclesofyourbrain,whichstoretheCSF.Thechoroidplexusismadeofconnectivetissue,bloodvessels,andtheependymalcells.Inadults,CPPtendstoforminthefourthventricle,whileinchildrenitformsonthelateralventricle.Thefourthventricleisinbetweenthecerebellumandthebrainstem.Thecerebellumisthepartofyourbrainthatcontrolsyourbalanceandcoordination.Thebrainstemcontrolsyourbreathing,swallowing,eyemovements,andothervitalfunctions.CPPmaycauseyourbraintomaketoomuchCSF.ItmightalsoblockthenormaldrainageofCSF.ThisexcessCSFinthebrain(hydrocephalus)cancreatepressureinthebrainthatcanbedangerous.EvenifaCPPisnotcancer,itcanstillcauseproblems.Itmaypressagainstbraintissueandcausesymptoms,suchasheadache,visionproblems,ornauseaandvomiting.ThestandardtreatmentforCPPissurgerytoremovethetumor.Whatcauseschoroidplexuspapilloma?HealthcareprovidersdonotyetknowwhatcausesCPP.Itispossiblethatcertaininfections,geneticfactors,immunesystemproblems,orenvironmentalfactorsplayaroleincausingthesetumors.Insomecases,CPPmaybelinkedwithce