In an animal model, we examined the extratympanic electrocochleographic response to static pressure changes (middle-ear pressure and intracranial pressure [ICP]) with attention to the summating potential (SP), action potential (AP), and the SP/AP ratio. With a closed middle ear, raised or lowered middle-ear pressure and raised or lowered ICP resulted in congruent increases of the SP and the SP/...

Salivary gland choristoma of the middle ear cavity is a very rare condition. These lesions are a result of a defective embryonic development and their adjacent structures may be associated with abnormalities. Here we report a case of salivary gland choristoma of the middle ear who presented to Be’sat Hospital, Tehran, Iran in 2015 with unilateral conductive hearing loss. There are 41 case repor...

Abstract Introduction Actinomycosis, a rare infection of the middle ear, has less than 50 documented cases worldwide. Actinomyces are an anaerobic, filamentous bacterium causing granuloma formation and suppurative infection. Case We present young male with nine-month history unilateral, yellow coloured otorrhoea hearing loss. Swabs showed no growth, not responding to oral or topical antibiotics...

OBJECTIVES The present study was designed to identify the correlations of bacterial strains of the middle ear and the nasopharynx in chronic suppurative otitis media (CSOM) patients who were scheduled for operations. METHODS Sixty-three patients with CSOM were enrolled in the study. Culture specimens were collected from the middle ear and nasopharynx of patients who were admitted for operatio...

Introduction: First branchial cleft anomalies manifest with duplication of the external auditory canal.   Case Report: This report features a rare case of microtia and congenital middle ear and canal cholesteatoma with first branchial fistula. External auditory canal stenosis was complicated by middle ear and external canal cholesteatoma, but branchial fistula, opening in the zygomatic root and...