Middle Ear Cholesteatoma

**Semantic type:** Disease or Syndrome

**Definition:** A non-neoplastic lesion characterized by the proliferation of keratinizing squamous epithelium in the middle ear that results in the accumulation of keratin and cells. It is usually caused by repeated infections. If left untreated, it may increase in size and destroy the adjacent delicate bones of the middle ear.

**Synonyms:** - Cholesteatoma of Middle Ear - Cholesteatoma of the Middle Ear - Diffuse cholesteatosis of middle ear