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Keratosis obturans : ウィキペディア英語版 | Keratosis obturans
Keratosis obturans is a disorder of keratin formation that involves external ear canal due to accumulation of cholesterol granules, which may lead to bony erosion. == Etiology == The exact etiology is not known. It appears to be result of abnormal shredding of the epithelium and failure of migration of cell from surface of tympanic membrane which leads to accumulation of mass. The keratin plugs are shed from all sides of ear canal. It looks like onion skin. Mass thus formed causes erosion and widening of bony canal. Its sometime associated with excess wax formation, Bronchiectasis and chronic sinusitis, and old age chronic smokers are risk factors.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Keratosis obturans」の詳細全文を読む
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