Renal VeinsVeinsVena Cava, InferiorRenal Nutcracker SyndromePortal VeinSaphenous VeinFlank PainVaricoceleRenal ArteryHematuriaVaricose VeinsPhlebographyUreteral DiseasesMesenteric VeinsKidneySplenic VeinAnatomy, RegionalFemoral VeinConstriction, PathologicNephrectomyPulmonary VeinsAzygos VeinVenous ThrombosisIliac VeinJugular VeinsNeoplasms, Vascular TissueHydronephrosisUreteral ObstructionUreteroscopyAnastomosis, SurgicalRenal Artery ObstructionUrologic Surgical ProceduresHypertension, RenovascularUrographyUreteral CalculiUrinary TractTomography, X-Ray ComputedUmbilical VeinsHypertension, RenalKidney NeoplasmsReplantationHepatic VeinsVascular Surgical ProceduresArteriovenous FistulaLeiomyosarcomaPopliteal VeinVascular NeoplasmsResins, PlantAorta, AbdominalNephrotic Syndrome