Preaxial Deficiency, Postaxial Polydactyly, and Hypospadias, also known as guttmacher syndrome, is related to hypospadias and hand-foot-genital syndrome. An important gene associated with Preaxial Deficiency, Postaxial Polydactyly, and Hypospadias is HOXA13 (Homeobox A13), and among its related pathways/superpathways is Genes controlling nephrogenesis. Affiliated tissues include bone, and related phenotypes are short thumb and postaxial hand polydactyly