The provider revises a previous simple mastoidectomy and converts it to a total mastoidectomy. He also removes diseased mastoid mucosa or cholesteatoma, if present. He performs the procedure because the prior procedure failed to produce a dry ear, which results in recurrent otitis media accompanied by accumulation of pus, eardrum perforation, and recurrent or residual hearing loss. The patient may also suffer from acute or recurrent cholesteatoma.
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