Cerebral VeinsIntracranial ThrombosisThrombosisSinus Thrombosis, IntracranialVenous ThrombosisCranial SinusesVeinsMeningeal ArteriesCerebral ArteriesCerebral AngiographySagittal Sinus ThrombosisDura MaterCerebrovascular CirculationSuperior Sagittal SinusIntracranial Embolism and ThrombosisPortal VeinSaphenous VeinCentral Nervous System Vascular MalformationsCavernous SinusSphenoid SinusCoronary ThrombosisFemoral VeinCerebral InfarctionVaricose VeinsUltrasonography, Doppler, ColorJugular VeinsCerebral PalsyTomography, X-Ray ComputedCarotid Artery ThrombosisIliac VeinUltrasonography, Doppler, TranscranialMiddle Cerebral ArteryIntracranial AneurysmPulmonary VeinsMagnetic Resonance ImagingMesenteric VeinsRenal VeinsPopliteal VeinPhlebographyImage Processing, Computer-AssistedInfarction, Middle Cerebral ArteryBrainAnticoagulantsSubclavian VeinMalaria, CerebralBrain IschemiaUmbilical VeinsSplenic VeinCerebral HemorrhageHepatic VeinsUpper Extremity Deep Vein ThrombosisAxillary VeinTime FactorsTreatment OutcomeVena Cava, InferiorThrombophilia