Treacher Collins syndrome is a rare medical condition caused by a genetic mutation. It affects the development of bones and other tissues of the face and results in abnormalities in the head, face, and ears. Other names for this syndrome are mandibulofacial dysostosis, Treacher Collins-Franceschetti syndrome, Franceschetti-Zwahlen-Klein syndrome, and zygoauromandibular dysplasia. Treacher Collins syndrome (TCS)...