Exostoses, Multiple HereditaryExostosesN-AcetylglucosaminyltransferasesOsteochondromaOsteochondromatosisChondrosarcomaParietal BoneOsteopoikilosisLanger-Giedion SyndromeChromosomes, Human, Pair 8Chromosomes, Human, Pair 11Heparitin SulfateChromosomes, Human, Pair 19Bone NeoplasmsRibsPedigreeNail DiseasesProteinsMutationTransplant Donor SiteHalluxN-Acetylhexosaminyltransferases