Although DDH has been classified as one of the musculoskeletal manifestations of the Wiedemann-Steiner syndrome, it has only been described in two Wiedemann-Steiner syndrome patients with exons 2–10 deletion and de novo nonsense mutation, p.Gln 1978* of KMT2A (Ko et al., 2016). This evidence concerns the gene KMT2A and Wiedemann-Steiner syndrome.