Angiodysplasia is the most common vascular lesion of the gastrointestinal tract, and this condition may be asymptomatic, or it may cause ...ForYouNews&PerspectiveDrugs&DiseasesCME&EducationAcademyVideoEdition:ENGLISHDEUTSCHESPAÑOLFRANÇAISPORTUGUÊSLogInSignUpIt'sFree!Edition:ENGLISHDEUTSCHESPAÑOLFRANÇAISPORTUGUÊSRegisterLogInNoResultsNoResultsForYouNews&PerspectiveDrugs&DiseasesCME&EducationAcademyVideoclosePleaseconfirmthatyouwouldliketologoutofMedscape.Ifyoulogout,youwillberequiredtoenteryourusernameandpasswordthenexttimeyouvisit.LogoutCancelhttps://profreg.medscape.com/px/getpracticeprofile.do?method=getProfessionalProfile&urlCache=aHR0cHM6Ly9lbWVkaWNpbmUubWVkc2NhcGUuY29tL2FydGljbGUvMTcwNzE5LW92ZXJ2aWV3processing....Drugs&Diseases>GastroenterologyAngiodysplasiaoftheColonUpdated:May08,2019Author:HusseinAl-Hamid,MD;ChiefEditor:BSAnand,MD more...ShareEmailPrintFeedbackCloseFacebookTwitterLinkedInGoogle+SectionsAngiodysplasiaoftheColonSectionsAngiodysplasiaoftheColonOverviewBackgroundPathophysiologyEtiologyEpidemiologyPrognosisPatientEducationShowAllPresentationHistoryPhysicalExaminationShowAllDDxWorkupApproachConsiderationsLaboratoryStudiesImagingStudiesProceduresHistologicFindingsShowAllTreatmentMedicalCareSurgicalCareLong-TermMonitoringShowAllMedicationMedicationSummaryOralContraceptivesSomatostatinAnaloguesShowAllMediaGalleryReferencesOverviewBackgroundAngiodysplasiaisthemostcommonvascularlesionofthegastrointestinaltract,andthisconditionmaybeasymptomatic,oritmaycausegastrointestinal(GI)bleeding.[1]Thevesselwallsarethin,withlittleornosmoothmuscle,andthevesselsareectaticandthin(seeimagebelow).Angiodysplasiaidentifiedonthececumwallduringcolonoscopy.ViewMediaGalleryPhillipsfirstdescribedavascularabnormalitythatcausedbleedingfromthelargebowelinalettertotheLondonMedicalGazettein1839.Duringthe1920s,neoplasmswereconsideredthemajorsourceofGIhemorrhage.However,inthe1940sand1950s,diverticulardiseasewasrecognizedasanimportantsourceofbleeding.In1951,Smithdescribedactivebleedin