Angelman Syndrome Apert Syndrome Carpenter's Syndrome Cockayne Syndrome Cornelia De Lange Syndrome Crouzon's Syndrome Down Syndrome (Trisomy 21) Edwards Syndrome (Trisomy 18) Fetal-Alcohol Syndrome Fetal-Anticonvulsant Syndrome Fragile-X Syndrome Goldenhar Syndrome Hurler Syndrome Marfans Syndrome Neu-Laxova Syndrome Patau Syndrome (Trisomy 13) Pena-Shokeir Syndrome Pfeiffer Syndrome Potter Syndrome Prader-Willi Syndrome Rett Syndrome Russell-Silver Syndrome Saethre-Chotzen Syndrome Thanatophoric Dwarfism Treacher-Collins Turner Syndrome Williams Syndrome