<unk> is a rare genetic disorder characterized by craniofacial deformities.<unk>  is found in 1 in 10,000 births.  The typical physical features include downward slanting eyes, a small lower jaw, and malformed or absent ears.
This condition is a result of a defect of the first arch during development.
Treacher Collins syndrome
Tome-Brune-Fardeau syndrome
Hadju Cheney Syndrome
Loken Senior syndrome
Turcot syndrome
Cockayne syndrome
Saethre-Chotzen syndrome
Zunich-Kaye syndrome