External Auditory Canal Atresia外耳道闭锁

摘要

Key Facts Synonyms:Congenital aural dysplasia,microtia Definition:Stenosis or atresia of external auditory canal(EAC)with associatedauricle(externalear)deformity.May be isolatedmalformation,orpartofacranial-facialsyndrome,suchasCrouzon's,Goldenhar'sorPierreRobin.Classicimagingappearance(CT):(1)Bony or membranous stenosis or atresia of EAC;(2)Underdeveloped mastoid air cells and small middle ear cavity;(3)Malformationsofmalleusandincusarecommon.