XanthomatosisXanthomatosis, CerebrotendinousCholestanolCholestanetriol 26-MonooxygenaseCholestanolsBrain Diseases, MetabolicSitosterolsSteroid HydroxylasesChenodeoxycholic AcidLipid Metabolism, Inborn ErrorsBrain DiseasesCholestanesHydroxysteroidsBile Acids and SaltsCholestenonesSkin Diseases, MetabolicTendonsCholestyramine ResinCholic AcidsWolman DiseaseCholesterolSterolsTabes DorsalisCholic AcidBileNeuromuscular Junction DiseasesAchilles TendonPhytosterolsCytochrome P-450 Enzyme SystemTendinopathyHydroxycholesterolsChromatography, GasHydroxylationSpinocerebellar DegenerationsGas Chromatography-Mass SpectrometryMuscular Diseases