Cerebral VeinsIntracranial ThrombosisVenous ThrombosisThrombosisSinus Thrombosis, IntracranialCranial SinusesVeinsPortal VeinThrombophlebitisMeningeal ArteriesFemoral VeinCerebral ArteriesCerebral AngiographyIliac VeinSagittal Sinus ThrombosisDura MaterUpper Extremity Deep Vein ThrombosisPhlebographySuperior Sagittal SinusCerebrovascular CirculationIntracranial Embolism and ThrombosisMesenteric VeinsAnticoagulantsRenal VeinsPulmonary EmbolismSplenic VeinJugular VeinsSaphenous VeinPopliteal VeinVaricose VeinsSubclavian VeinCentral Nervous System Vascular MalformationsCavernous SinusSphenoid SinusUltrasonography, Doppler, ColorCoronary ThrombosisTomography, X-Ray ComputedCerebral InfarctionFibrin Fibrinogen Degradation ProductsVena Cava, InferiorHeparin, Low-Molecular-WeightAxillary VeinThrombophiliaCerebral PalsyCarotid Artery ThrombosisPostthrombotic SyndromeMagnetic Resonance ImagingUltrasonography, Doppler, TranscranialBudd-Chiari SyndromeMiddle Cerebral ArteryIntracranial AneurysmUltrasonography, Doppler, DuplexHeparinVenous ThromboembolismPulmonary VeinsTreatment OutcomeProtein S DeficiencyFactor VLegFibrinolytic AgentsThrombectomyVena Cava FiltersThromboembolismWarfarinTime Factors