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may damage the ear drum and bones of the middle ear

cholesteatoma

Explanation:

Cholesteatoma is an important and relatively common disease. When left untreated, it can have serious complications and result in partial or total hearing loss. A cholesteatoma is a benign tumor that affects the middle ear and tympanum and can cause hearing problems. The disease consists of an accumulation of skin layers located behind the tympanic membrane. Cholesteatoma usually develops as a cyst, knocking down the layers of old skin.

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the cell cycle is the final answer! : )