_:vb50956017 "url:https://en.wikipedia.org/wiki/Cholesteatoma"^^ . _:vb50956017 "A keratosis that is characterized by keratinizing squamous epithelium located in middle ear and/or mastoid, subepithelial connective tissue and by the progressive accumulation of keratin debris with or without surrounding inflammatory reaction."^^ . _:vb50956017 . _:vb50956017 . _:vb50956017 "url:https://www.ncbi.nlm.nih.gov/pubmed/26223725"^^ . _:vb50956017 . _:vb50956017 . _:vb50956017 . _:vb50956017 .