Tags: Disease.
Cholesteatoma is a destructive and expanding growth consisting of keratinizing squamous epithelium in the middle ear and/or mastoid process. Although these are not strictly speaking tumours or cancers they can still cause significant problems because of their erosive and expansile properties resulting in the destruction of the ossicles as well as their possible spread through the base of the skull into the brain. They are also often infected and result in chronically draining ears.
