Budd-Chiari SyndromeRadiology, InterventionalPortasystemic Shunt, Transjugular IntrahepaticSyringomyeliaSyndromeForamen MagnumEncephalocelePostoperative ComplicationsPlatybasiaCranial Fossa, PosteriorMeningomyeloceleDecompression, SurgicalSubarachnoid SpaceDecompressive CraniectomyOsteotomyPelvic BonesTreatment OutcomeSpinal CanalDown SyndromeCerebrospinal Fluid PressureMetabolic Syndrome X