<unk>  is a rare disorder, initially reported in 1912 by Maurice Klippel and Andre<unk>  from France, characterized by the congenital fusion of any 2 of the 7 cervical vertebrae.
Klippel-Feil syndrome
Klippel-Trenaunay-Weber syndrome
Treacher Collins syndrome
Sturge-Weber syndrome
Prader-Willi syndrome
Landau-Kleffner syndrome
Bonnemann-Meinecke-Reich syndrome
Tome-Brune-Fardeau syndrome