"A cholesteatoma which involves invasion of the squamous tissue into a localized area of bony erosion of the ear canal. It may develop spontaneously or as a consequence of infection, trauma or surgery."^^ . . "disease_ontology"^^ . "ICD10CM:H60.4"^^ . "external canal cholesteatoma"@en . "UMLS_CUI:C0155398"^^ . _:vb50956549 . _:vb50956552 . _:vb50956549 . _:vb50956552 _:vb50956551 . "cholesteatoma of external ear"^^ . _:vb50956550 . "ICD9CM:380.21"^^ . _:vb50956549 _:vb50956552 . _:vb50956550 . _:vb50956551 . . _:vb50956550 . _:vb50956549 . . _:vb50956551 . _:vb50956550 . "SNOMEDCT_US_2021_09_01:35247001"^^ . _:vb50956552 . _:vb50956551 _:vb50956550 . . "DOID:9462"^^ .