Czech Dysplasia, also known as spondyloepiphyseal dysplasia with metatarsal shortening, is related to progressive pseudorheumatoid dysplasia and spondylarthropathy, and has symptoms including arthralgia and waddling gait. An important gene associated with Czech Dysplasia is COL2A1 (Collagen Type II Alpha 1 Chain). Affiliated tissues include bone, and related phenotypes are short toe and arthralgia