There are two causes of atresia of external auditory canal, one of which is congenital and the other, acquired deformity. Embryological, ectodermal origin of congenital atresia of the external auditory canal is very Tare. Developmental defect of the canal may involve only the cartilaginous portion, only the bony portion, or most, commonly, both In the majority of cases, the entire canal wall he absent with, at most, a shallow dimple serving to delineate the tragus from the rest of the deformed auricle.
There was only one reported case in our country until now about the congenital atresia of external auditory canal with chronic mastoiditis by Dr. Park.
The authors have experienced recently a case of congenital atresia of external auditory canal with chronic suppurative otitis media and cholesteatoma in a 20 year old male who had been suffering from atresia of external auditory canal and hearing impairment on right ear since birth and received incision and drainage of 2 times in right posterior auricular region due to swelling and tenderness in that area.
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