schmitt gillenwater kelly syndrome schmitt gillenwater kelly syndrome schmitt gillenwater kelly syndrome is a rare autosomal dominant congenital disorder consisting of radial hypoplasia, triphalangeal thumbs, hypospadias, and maxillary diastema. schmitt gillenwater kelly syndromeother namesradial hypoplasia-triphalangeal thumbs-hypospadias-maxillary diastema syndromeschmitt gillenwater kelly syndrome has an autosomal dominant pattern of inheritance.