Keratosis Obliterans Canal Cholesteatoma

• Keratosis Obliterans: external auditory canal cholesteatoma caused by blockage of the EAC permitting accumulation of epithelial debris, bone remodeling from pressure of the keratin plug may cause bony enlargement

• Invasive Keratitis: local accumulation of epithelial debris that occurs on the floor of the EAC

• SSx: keratin debris in EAC, bony expansion of canal wall, CHL, may become secondarily infected, may erode into middle ear or attic

• Dx: clinical history and physical examination

• Rx: frequent and aggressive debridement of EAC, cleansing with ototopical (softening) drops

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