Radial Hypoplasia, Triphalangeal Thumbs, Hypospadias, and Maxillary Diastema, also known as radial hypoplasia, triphalangeal thumbs and hypospadias, is related to contractures, pterygia, and spondylocarpotarsal fusion syndrome 1a and hypospadias. Related phenotypes are mandibular prognathia and abnormal dermatoglyphics