The disease is lethal. Most infants that are not stillborn with<unk>  syndrome die within hours to days of birth. The longest survival time reported in medical literature is 28 months.
Meckel–Gruber syndrome
Seckel syndrome
Laurence–Moon syndrome
Silver–Russell syndrome
Klüver–Bucy syndrome
Klippel–Feil syndrome
Koolen–De Vries syndrome
Landau–Kleffner syndrome