Spondylometaphyseal Dysplasia, Sedaghatian Type, also known as sedaghatian chondrodysplasia, is related to opsismodysplasia and spondyloepimetaphyseal dysplasia, strudwick type. An important gene associated with Spondylometaphyseal Dysplasia, Sedaghatian Type is GPX4 (Glutathione Peroxidase 4). Affiliated tissues include bone and heart, and related phenotypes are delayed skeletal maturation and atrioventricular block