Diastrophic dysplasia
Diastrophic dysplasia (DTD; MIM 222600) as well as achondrogenesis type IB (ACG1B; MIM 600972), atelosteogenesis type II (AO2; MIM 256050) and autosomal recessive form of multiple epiphyseal dysplasia (EDM4; MIM 226900) are caused by mutations in the diastrophic dysplasia sulfate transporter (DTDST/SLC26A2) gene. DTD is a severe disorder characterized by marked short stature involving both the trunk and limbs, clubfoot, cleft palate, a "hitchhiker thumb" and "hitchhiker toe" deformity. DTD is non-lethal but progressive. Spinal changes and arthrosis of the hips frequently occur.