Cholesteatoma

cholesteatoma /cho·le·ste·a·to·ma/ (-ste?ah-to´mah) a cystlike mass lined with stratified squamous epithelium filled with desquamating debris, often including cholesterol, usually in the middle ear and mastoid region.

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cho·les·te·a·to·ma (k-lst--tm, kl-st-)

n. pl. cho·les·te·a·to·mas or cho·les·te·a·to·ma·ta (-m-t)

A tumorlike mass of keratinizing squamous epithelium and cholesterol, usually occurring in the middle ear and mastoid region. Also called pearl tumor.

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Cholesteatoma

A cystic mass of cells in the middle ear, occurring as a congential defect or as a serious complication of a disease or traumtic condition of the ear.

Mentioned in: Ear Surgery, Mastoidectomy

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cholesteatoma (kles´tētō´m),

n a cystic mass composed of epithelial cells and cholesterol that is found in the middle ear and occurs either as a congenital defect or as a serious complication of chronic otitis media.

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cholesteatoma

a cystlike mass with a lining of stratified squamous epithelium, filled with desquamating debris frequently including cholesterol, which occurs in the meninges, central nervous system and bones of the skull, but most commonly in the choroid plexus of the ventricles, and especially in horses and other Equidae. Causes signs of increased intracranial pressure, initial excitement followed by somnolence and apathy. Hydrocephalus may be the end-stage.