Xanthomatosis, CerebrotendinousXanthomatosisCholestanolCholestanetriol 26-MonooxygenaseCholestanolsBrain Diseases, MetabolicSteroid HydroxylasesChenodeoxycholic AcidBrain DiseasesCholestanesHydroxysteroidsLipid Metabolism, Inborn ErrorsCholestenonesBile Acids and SaltsTendonsCholic AcidsTabes DorsalisCholic AcidNeuromuscular Junction DiseasesBileCytochrome P-450 Enzyme SystemTendinopathySterolsCholesterolSpinocerebellar DegenerationsHydroxycholesterolsHydroxylationGas Chromatography-Mass SpectrometrySitosterolsMuscular DiseasesChromatography, GasCerebellum