[non-neoplastic keratinizing mass with stratified squamous epithelium, frequently occurring in the meninges, central nervous system, bones of the skull, and most commonly in the middle ear and mastoid region. ( CSP )]
UMLS (CSP) C0008373 Relation/PAR: keratosis
Middle Ear Disorder
Relation/CHD: CHOLESTEATOMA MIDDLE EAR