Renal VeinsVeinsVaricose VeinsSaphenous VeinPortal VeinPulmonary VeinsVena Cava, InferiorFemoral VeinMesenteric VeinsJugular VeinsHepatic VeinsRenal Nutcracker SyndromeIliac VeinSplenic VeinVaricoceleFlank PainVenous InsufficiencyPhlebographyAzygos VeinRenal ArteryUmbilical VeinsVena Cava, SuperiorVenous ThrombosisHematuriaLegPopliteal VeinConstriction, PathologicAnatomy, RegionalUltrasonography, Doppler, DuplexSubclavian VeinNeoplasms, Vascular TissueKidneyCerebral VeinsAnastomosis, SurgicalNephrectomyRenal Artery ObstructionRetinal VeinHypertension, RenovascularBrachiocephalic VeinsVascular Surgical ProceduresAxillary VeinArteriovenous FistulaRetinal Vein OcclusionTomography, X-Ray ComputedHypertension, RenalReplantationVascular NeoplasmsLeiomyosarcomaMuscle, Smooth, VascularAorta, AbdominalResins, PlantUltrasonography, Doppler, ColorNephrotic SyndromeThrombosis