Renal VeinsAnastomosis, SurgicalVeinsArteriovenous AnastomosisVena Cava, InferiorRenal Nutcracker SyndromePortal VeinSaphenous VeinFlank PainVaricoceleConstriction, PathologicSurgical StaplersRenal ArteryPhlebographyVaricose VeinsSplenic VeinMesenteric VeinsAnastomosis, Roux-en-YFemoral VeinHematuriaJugular VeinsPulmonary VeinsAnatomy, RegionalIliac VeinAzygos VeinVenous ThrombosisSuture TechniquesSurgical StaplingNeoplasms, Vascular TissueKidneyAnastomotic LeakVascular Surgical ProceduresNephrectomyProctocolectomy, RestorativeRenal Artery ObstructionColonic PouchesAorta, AbdominalHypertension, RenovascularReplantationHepatic VeinsArteriovenous FistulaTreatment OutcomeSuturesTomography, X-Ray ComputedUmbilical VeinsPostoperative ComplicationsHypertension, RenalPolytetrafluoroethylenePopliteal VeinRectumCadaverIleostomyOperative TimeLeiomyosarcomaColectomyLigationVascular NeoplasmsResins, PlantNephrotic SyndromeThrombosisPouchitisLaparoscopyAnal CanalUltrasonography, Doppler, Color