Spondyloepimetaphyseal Dysplasia Congenita, Strudwick Type An important gene associated with Spondyloepimetaphyseal Dysplasia Congenita, Strudwick Type is COL2A1 (Collagen Type II Alpha 1 Chain). Affiliated tissues include bone and spinal cord, and related phenotypes are flared metaphysis and aplasia/hypoplasia involving bones of the extremities