Splenic VeinVenous ThrombosisSplenic RupturePortal VeinEsophageal and Gastric VaricesSplenic DiseasesSplenectomyHypertension, PortalGastrointestinal HemorrhageThrombosisMesenteric VeinsPortal SystemHypertensionVeinsThrombophlebitisSplenic ArteryRenal VeinsHypersplenismFemoral VeinHypertension, PulmonaryIliac VeinUpper Extremity Deep Vein ThrombosisPhlebographyPortasystemic Shunt, SurgicalSplenorenal Shunt, SurgicalAnticoagulantsPulmonary EmbolismVaricose VeinsJugular VeinsSaphenous VeinPopliteal VeinSubclavian VeinTomography, X-Ray ComputedSinus Thrombosis, IntracranialSplenomegalyIntracranial ThrombosisCoronary ThrombosisPortal PressureTreatment OutcomeVena Cava, InferiorLiver CirrhosisHypertension, RenalSplenic NeoplasmsFibrin Fibrinogen Degradation ProductsHeparin, Low-Molecular-Weight