More recently, CHST3 (carbohydrate (chondroitin 6) sulfotransferase 3) mutations, involved in spondyloepiphyseal dysplasia with congenital joint dislocations [SDCD; MIM# 143095], which shares some features with DD including multiple dislocations and joint hyperlaxity, have been reported in one case of DD type 2 [Unger et al., 2010]. Here, CHST3 is linked to spondyloepiphyseal dysplasia.