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Up to: Chronic purulent otitis media
Chronic atticoantral disease
A chronic purulent otitis media which involves perforation in the attic region (pars flaccida of the tympanic membrane) or at the posterosuperior margin, with in-growth of squamous epithelium into the middle ear. This is caused as a result of poor ventilation of the middle ear and episodes of infection.
This condition has no sub-types.