The cause of<unk>  is largely unknown. However, it is thought to be multifactorial, although there may be a genetic component, which would account for certain familial patterns. It has been suggested that there is a branchial arch development issue late in the first trimester. An increase in<unk>  in the children of Gulf War veterans has been suggested, but the difference was shown to be statistically insignificant.
Goldenhar syndrome
Otocephaly
Joubert syndrome
DiGeorge syndrome
Lennox–Gastaut syndrome
Benjamin syndrome
Christianson syndrome
Timothy syndrome