Legend Axial CT images show a normal development of R temporal bone structures. The left side shows no pneumatization of mastoid air cells, no visible ossicles and a hypoplastic tympanic cavity.

Legend Coronal images show a bony external auditory canal atresia plate with fusion of the malleus to the atresia plate. Key words: temporal bone congenital developmental

ENT Diagnosis: Hypoplasia external auditory canal & tympanic cavity