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The procedure of mastoidectomy and epitympanotomy effected a two-year arrest of serous otitis media and correction of a refractory retraction pocket in 12 out of 20 patients with one patient lost to follow-up. Each mastoid and epitympanum was extensively involved with chronically inflamed tissue which surrounded the ossicles and chorda tympani nerve.
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Proud et al. (1976) studied this question.
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