IntroductionX-linked spondyloepiphyseal dysplasia tarda(SEDL, OMIM 313400) is a rare, X-linked recessive osteochondrodysplasia with an estimated prevalence of ~ 1.7 per million in Britain.

• X-连锁迟发性脊椎骨骺发育不良(X-linked spondyloepiphyseal dysplasia tarda,SEDL,OMIM 313400)是一种罕见的遗传性骨软骨发育不良性疾病。