전음성 난청이 동반된 하악안면이골증 1례

Treacher-Collins Syndrome, also called mandibulofacial dysostosis, affects the shape of the head and face. Small and slanting lower jaw, down slanting eyes, notched lower eyelids, lack or absence of the lower eyerash, hypoplasia or absence of the zygomatic processes and flattening of the frontonasal angle are characteristics of Treacher-Collins Syndrome. Most children with Treacher-Collins have normal development and intelligence. They have 40% hearing loss in each ear due to abnormalities of the outer and middle ear, which conduct sound to the nerve endings. This paper reviewed a case of bilateral conductive hearing loss on Treacher-Collins Syndrome. (J Clinical Otolaryngol 2003;14:302-305)