Definition: Retraction of the tympanic membrane with complete obliteration of the middle ear space due to adhesion of tympanic membrane to the promontory.
Long standing Otitis media with effusion, atelectasis or suppurative Otitis media.
Retracted fixed tympanic membrane.
Pure tone audiometer reveales conductive hearing loss. Impedance audiometer reveales type B tympanogeam.
Treatment: Hearing aid.