{"id":304,"date":"2021-01-04T15:21:09","date_gmt":"2021-01-04T22:21:09","guid":{"rendered":"https:\/\/neurotucson.fm1.dev\/ear-hearing\/auditory-canal-stenosis-and-atresia\/"},"modified":"2021-02-02T16:55:03","modified_gmt":"2021-02-02T23:55:03","slug":"auditory-canal-stenosis-and-atresia","status":"publish","type":"page","link":"https:\/\/neurotucson.com\/ear-hearing\/otology\/auditory-canal-stenosis-and-atresia\/","title":{"rendered":"Auditory Canal Stenosis and Atresia"},"content":{"rendered":"\n

Auditory canal atresia is a developmental absence of the external auditory canal. It is often associated with microtia (a poorly developed outer ear). One ear is typically affected, but both ears can be atretic. Patients with atresia often have other developmental abnormalities of the external ear and middle ear, resulting in\u00a0conductive hearing loss<\/a>\u00a0\u2013 hearing loss that arises from abnormal transmission of sound through the outer and\/or middle ear. The inner ears and auditory nerves may be normal.<\/p>\n\n\n\n

Auditory canal stenosis refers to narrowing of the ear canal(s). This can also be associated with external and middle ear malformations. Patients with auditory canal stenosis are at high risk for ear canal\u00a0cholesteatoma<\/a>\u00a0formation. Therefore, temporal bone imaging studies may be required to ensure that this is not happening.<\/p>\n\n\n\n

Auditory canal atresia is congenital (present at birth) while stenosis can be congenital or acquired. Congenital atresia\/stenosis may be associated with several different syndromes, including Treacher Collins, Goldenhar, Klippel-Feil, Branchio-Oto-Renal (BOR), and Hemifacial Microsomia. Acquired stenosis is unusual but is usually associated with infection, chronic inflammation, trauma, radiation therapy, or poor ear canal healing after surgery.<\/p>\n\n\n\n

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