Spondyloperipheral Dysplasia

**Semantic type:** Disease or Syndrome

**Definition:** An autosomal dominant condition caused by mutation(s) in the COL2A1 gene, encoding collagen alpha-1(II) chain. It is characterized by short stature, pugilistic facies, midface hypoplasia, spondyloepiphyseal dysplasia, kyphosis, short ulna, and absent styloid process. Mutation(s) in the same gene are responsible for Kniest dysplasia.