Mesenteric VeinsHyperplasiaTunica IntimaMuscle, Smooth, VascularPortal VeinMesenteric Vascular OcclusionVeinsGraft Occlusion, VascularCarotid Artery InjuriesPortal SystemCarotid ArteriesSplenic VeinFemoral VeinRecurrenceRenal VeinsSaphenous VeinProstatic HyperplasiaEndometrial HyperplasiaIliac VeinSplanchnic CirculationIdiopathic Pulmonary FibrosisVaricose VeinsVenous ThrombosisHepatic VeinsJugular VeinsVisceraVena Cava, InferiorPulmonary VeinsHypertension, PortalPancreaticoduodenectomyAdrenal Hyperplasia, CongenitalIofetamineNorepinephrineMesenteric ArteriesLiver CirculationPortasystemic Shunt, SurgicalMesenteric Artery, SuperiorAdrenergic alpha-2 Receptor AntagonistsTomography, X-Ray ComputedThrombosisEsophageal and Gastric VaricesAmphetaminesGingival HyperplasiaThymus HyperplasiaDogsFocal Nodular HyperplasiaScoliosisAnastomosis, SurgicalArthritis, JuvenileUmbilical VeinsTreatment OutcomeBudd-Chiari SyndromeLiverPurpura, Thrombocytopenic, IdiopathicGastrointestinal Hemorrhage