1) Birth defect 2) Congenital abnormality 3) Congenital anomaly 4) Congenital defect 5) Congenital disorder 6) Polydactyly 1) Polydactyly 
(hi″pәr-dak´tә-le) polydactyly.
hyperdactyly An excess of digits; such as, in the extremely rare condition when a person has six (or more) fingers on any one hand or six (or more toes) on a foot.