HemangiomaHemangioma, CavernousHemangioma, CapillaryFacial NeoplasmsNeurocutaneous SyndromesHemangiosarcomaVascular NeoplasmsNeoplasms, Vascular TissueHemangioendotheliomaHemangioma, Cavernous, Central Nervous SystemKlippel-Trenaunay-Weber SyndromeLiver NeoplasmsSulfur HexafluorideOrbital NeoplasmsSpinal NeoplasmsFocal Nodular HyperplasiaPort-Wine StainSkin NeoplasmsContrast MediaTomography, X-Ray ComputedSkin Diseases, VascularUltrasonographyNoninvasive VentilationTechnetiumMagnetic Resonance ImagingEpidural NeoplasmsEnchondromatosisPulmonary Sclerosing HemangiomaEyelid NeoplasmsArteriovenous MalformationsSplenic NeoplasmsLymphangiomaEar DiseasesAngiomatosisCystadenomaSensitivity and SpecificityTechnetium Tc 99m Aggregated AlbuminThoracic NeoplasmsSturge-Weber SyndromeInfant, NewbornEye AbnormalitiesJaundice, Chronic IdiopathicPropranololLasers, DyeTechnetium Tc 99m PentetateSodium Pertechnetate Tc 99mDisseminated Intravascular CoagulationVertebroplastyAngiographyReproducibility of ResultsSyndromeHistiocytoma, Benign FibrousInjections, IntralesionalImage EnhancementTechnetium Tc 99m Sulfur ColloidTriamcinoloneCerebellopontine AngleNeoplasms, Multiple PrimaryTreatment OutcomeRetinal NeoplasmsRespiratory InsufficiencyUltrasonography, Doppler, ColorRetrospective StudiesDog Diseasesvon Hippel-Lindau DiseaseFluorocarbonsProspective StudiesThoracic VertebraeTomography, Emission-Computed, Single-PhotonDiagnostic ImagingPositive-Pressure RespirationSpinal Cord NeoplasmsGadolinium DTPAHead and Neck NeoplasmsAbnormalities, MultipleCystsImmunohistochemistryAntigens, CD31Gentian VioletFollow-Up StudiesSoft Tissue NeoplasmsSpinal Cord CompressionBrain NeoplasmsLiver DiseasesNeovascularization, PathologicInterferon InducersAdrenergic beta-AntagonistsErythrocytesBlood VesselsCarcinoma, HepatocellularCyclohexanesAngiopoietin-2Embolization, TherapeuticVascular Endothelial Growth Factor AEndothelium, VascularRetinopathy of PrematurityLiverVon Hippel-Lindau Tumor Suppressor ProteinPredictive Value of TestsMonitoring, Physiologic