Post Inflammatory Medial Canal Fibrosis: A Case Report

Abstract

Medial canal fibrosis is an interesting type of acquired meatal atresia that is characterized by formation of a solid core of fibrous tissue in the medial part of the external auditory meatus abutting the tympanic membrane. A review of the literature showed that many different terms have been used interchangeably to report the same or similar condition. This is a case of medial canal fibrosis being reported to emphasize the importance in diagnosing this rare but easily treatable disease. A 16 yrs old female presented with bilateral conductive hearing loss & history of recurrent rhinitis & sinusitis. CT Temporal bone showed soft tissue density lesions in bilateral bony EAC (External auditory canal) with no bony erosion & normal middle ear. A diagnosis of Medial canal fibrosis was given. The patient was operated & biopsy of the specimen came out to be inflammatory granulation tissue. Keywords: External auditory canal (EAC), Granulation tissue, Post inflammatory medial canal fibrosis. Case DetailsA 16 year-old girl presented with hearing loss since 2yrs and long-standing previous history of rhinitis. She had no history of ear surgery.Our otologic examination revealed that the both ear canal were short and terminated with a skin-covered barrier. Audiology examination revealed conductive hearing loss. Computed tomographic (CT) (Bright speed velocity CT scanner; GE Medical ____________________________________ Corrospondence to:

A Rare Case of Idiopathic Bilateral Medial Canal Fibrosis

“…Otologic findings can show shortened EAC with a pseudomembrane. Pure tone audiometry (PTA) usually shows conductive hearing loss in view of the sound being unable to reach the tympanic membrane [ 1 ]. In our case, the patient presented with a dry phase, and the findings of the otoscopy were suggestive of MCF.…”

“…Medial canal fibrosis is the formation of thick, solid fibrous tissue in the medial part of the bony external ear canal, which can be partial or complete [ 1 ]. Most patients presented with hearing loss (78%) and otorrhea (59%) [ 2 ].…”