SclerotherapySpidersSclerosing SolutionsSpider VenomsEsophageal and Gastric VaricesSpider BitesVaricose VeinsVeinsSodium Tetradecyl SulfateGastrointestinal HemorrhageSaphenous VeinVascular MalformationsBlack Widow SpiderPortal VeinSilkStockings, CompressionEsophagoscopyFemoral VeinEnbucrilateVenous InsufficiencyHypertension, PortalSplenorenal Shunt, SurgicalVaricocelePortasystemic Shunt, SurgicalHemostasis, EndoscopicLigationPulmonary VeinsVaricose UlcerRecurrenceJugular VeinsKidney Diseases, CysticTissue AdhesivesArteriovenous MalformationsFibroinsUltrasonography, Doppler, DuplexPredatory BehaviorTreatment OutcomeUltrasonography, InterventionalBrown Recluse SpiderAtelinaeBone Cysts, AneurysmalTesticular HydroceleArthropod VenomsPhlebographyHemorrhoidsSodium MorrhuateEndoscopyInjections, IntralesionalLiver CirrhosisPolyethylene GlycolsMesenteric VeinsCystsRenal VeinsUmbilical VeinsIliac VeinArachnidaEndoscopy, GastrointestinalProspective StudiesTime FactorsPicibanilHepatic VeinsHyperpigmentationPopliteal VeinEthanolCyanoacrylatesSpermatoceleRanulaRectal ProlapseVascular Surgical ProceduresLymphatic AbnormalitiesNadololSpermatic CordTelangiectasisEsophageal DiseasesVenous PressureFollow-Up Studies