cholesteatoma https://www.malacards.org/card/cholesteatoma ICD9:385.30 UMLS:C0008373 cholesteatoma SCTID:363668000 NCIT:C2944 A pathologic process characterized by the proliferation of keratinizing squamous epithelium resulting in the accumulation of keratin and cells in the middle ear and/or mastoid. It may be congenital or acquired. If left untreated, it may increase in size and destroy adjacent structures. MONDO:0006530 cholesteatoma (disease) MEDGEN:3043 primary acquired cholesteatoma (type) secondary acquired cholesteatoma (type) congenital cholesteatoma (type) DOID:869 cholesteatoma (disease) MESH:D002781 EFO:1000675 HP:0009797 keratosis