Dyggve–Melchior–Clausen syndrome and Smith-McCort dysplasia are recessive spondyloepimetaphyseal dysplasias caused by loss-of-function mutations in dymeclin (DYN) [57–59], the candidate gene closest to the marker at CFA7:79,570,691 associated with RCCL. The gene discussed is DYM; the disease is spondyloepimetaphyseal dysplasia.