Goldenhar syndrome (GS), also known as oculo-auriculo-vertebral dysplasia (OAV), is a rare developmental syndrome characterized by a classic triad of mandibular hypoplasia resulting in facial asymmetry, ear and/or eye malformations, and vertebral anomalies.

Pierre Robin malformation is a sequence of developmental malformations characterized by micrognathia (mandibular hypoplasia), glossoptosis and cleft palate.