Mandibulofacial Dysostosis is a condition characterized by a number of head and neck defects owing to the malformation of these structures during the developmental stage. It is often referred to as Treacher-Collins syndrome, named after the scientists
who discovered it. It is also called as the Franceschetti syndrome. Mandibulofacial Dysostosis is inherited as a dominant familial trait and is a part of a group of syndromes referred to as the "branchial arch syndromes" Branchial arches are developmental structures from which most of the head and neck structures are formed.