Spondyloepiphyseal dysplasia with congenital joint dislocations (SEDCJD) is also known as SED Omani type. Knees, hip and elbow dislocations are common. Thoracic kyphoscoliosis develops in late childhood. Affected individuals are homozygous for a missense mutation of CHST3 encoding the enzyme chondroitin 6-O-sulfotransferase-1 (C6ST-1).
