[Hemifacial microsomia or syndrome of the first and second branchial arch: clinical features and therapeutic considerations].

The syndrome of hemifacial microsomia is formed by a constellation of congenital malformations of the originating face structures of the I and II branchial archs, in which the first pharingeal stock and the first soft palate take part to, along with the nucleus of the temporary bone. We present a new case of hemifacial microsomia, and reviewed its clinical characteristics and therapeutic possibilities.