Venous ThrombosisThrombosisPortal VeinVeinsThrombophlebitisFemoral VeinIliac VeinUpper Extremity Deep Vein ThrombosisPhlebographyMesenteric VeinsAnticoagulantsRenal VeinsPulmonary EmbolismSplenic VeinSaphenous VeinPopliteal VeinVaricose VeinsSubclavian VeinJugular VeinsHepatic VeinsSinus Thrombosis, IntracranialIntracranial ThrombosisCoronary ThrombosisHepatic ArteryVena Cava, InferiorFibrin Fibrinogen Degradation ProductsHeparin, Low-Molecular-WeightAxillary VeinThrombophiliaPostthrombotic SyndromeBudd-Chiari SyndromeCerebral VeinsCarotid Artery ThrombosisUltrasonography, Doppler, DuplexHeparinVenous ThromboembolismPulmonary VeinsTreatment OutcomeFactor VProtein S DeficiencyLegThrombectomyVena Cava FiltersFibrinolytic AgentsThromboembolismWarfarinMesenteric Vascular OcclusionHypertension, PortalPostphlebitic SyndromeStockings, CompressionPlethysmography, ImpedanceIntermittent Pneumatic Compression DevicesTime FactorsRisk FactorsRetrospective StudiesTomography, X-Ray ComputedLiverHemorrhageLiver CirrhosisUmbilical VeinsLiver NeoplasmsProspective StudiesPortasystemic Shunt, SurgicalActivated Protein C ResistanceBandagesThrombolytic TherapyFollow-Up StudiesProthrombinVenous InsufficiencySagittal Sinus ThrombosisLiver CirculationPostoperative ComplicationsUltrasonography, DopplerLiver TransplantationRecurrenceLower ExtremityUltrasonography, Doppler, ColorIntracranial Embolism and ThrombosisHepatic EncephalopathyCatheterization, Central VenousBlood CoagulationLiver DiseasesAntithrombin III DeficiencyEnoxaparinFibrinogenSplenorenal Shunt, SurgicalEsophageal and Gastric VaricesHepatic Stellate CellsProtein C DeficiencySplenectomyCatheterization, PeripheralAngiographyAntiphospholipid SyndromeVascular PatencyUltrasonographyHemostasisRetinal Vein OcclusionPregnancy Complications, CardiovascularCarcinoma, HepatocellularIncidence