Sinus Thrombosis, IntracranialCranial SinusesSagittal Sinus ThrombosisCerebral VeinsCavernous Sinus ThrombosisLateral Sinus ThrombosisPseudotumor CerebriBattered Child SyndromePapilledemaDura MaterCerebral AngiographyMagnetic Resonance AngiographyThrombosisVenous ThrombosisMagnetic Resonance ImagingTomography, X-Ray ComputedIntracranial HypertensionIntracranial ThrombosisCavernous SinusPhlebographySuperior Sagittal SinusCentral Nervous System Vascular MalformationsTransverse SinusesArachnoidMastoiditisMaxillary SinusAnticoagulantsParanasal SinusesHeadache