This document describes and defines several common congenital anomalies including polydactyly (extra digits), syndactyly (fused digits), omphalocele (organs outside abdomen), spina bifida (incomplete spinal fusion), anencephaly (absent brain/skull), microcephaly (small head), macrocephaly (large head), renal agenesis (absent kidney), congenital hydrocele (fluid around testicles), congenital hydrocephalus (excess CSF in brain), cleft lip (gap in upper lip), cleft palate (gap in roof of mouth), ARM (anorectal malformation), microtia (underdeveloped ear), congenital arhinia (absent nose),