Spondylometaphyseal Dysplasia, Algerian Type, also known as spondylometaphyseal dysplasia with severe genu valgum, is related to spondyloepimetaphyseal dysplasia, strudwick type and osteochondrodysplasia. An important gene associated with Spondylometaphyseal Dysplasia, Algerian Type is COL2A1 (Collagen Type II Alpha 1 Chain). Affiliated tissues include bone, and related phenotypes are abnormality of the vertebral column and metaphyseal dysplasia