Abstract
A 44-year-old man with a past history of bronchial asthma and allergic rhinitis visited our hospital because of right otorrhea and hearing loss. Otoscopy showed a smooth polypous mass fully occupying the right external auditory meatus. Computed tomography revealed soft tissue density in the right tympanic cavity, epitympanum, and mastoid antrum without distinct bony erosion. Tympanoplasty was performed. A perforation of the tympanic membrane was considered to have pre-existed, and the aural polyp appeared to have grown from the mucosa of the middle ear through the perforation. Histologic examination revealed increased numbers of eosinophiles in the polyp. RAST showed positive scores for house dust, mites, silk, and other allergens. After surgery, the patient had no otorrhea and the aural polyp did not recur. Therefore we presumed that immediate allergy affected the progress of the otitis media in this case, and that the antigens entered the middle ear through the perforation.
