Retention cyst in chronic otitis media

March 24, 2013
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Otoscopic Clinic

The retention cyst originates from the obstruction of a glandular structure and contains fluid, while the cholesteatoma contains keratinizing squamous epithelium.

A 58-year-old man was referred to our clinic for a right ear discharge and hearing disorder he had experienced since childhood. The otoscopic examination showed total perforation of his right eardrum, erosion of the ossicular chain, and a mucosa-lined, whitish, oval lesion at the anteroinferior portion of the middle ear (figure). Pure-tone audiometry demonstrated a right-sided conductive hearing loss with a 38-dB air-bone gap.

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