TY - CHAP M1 - Book, Section TI - Cholesteatoma A1 - Jauch, Edward C. A1 - Hall, Gregory A1 - Knoop, Kevin J. A2 - Knoop, Kevin J. A2 - Stack, Lawrence B. A2 - Storrow, Alan B. A2 - Thurman, R. Jason PY - 2021 T2 - The Atlas of Emergency Medicine, 5e AB - Despite their name, cholesteatomas are not composed of cholesterol, nor are they a form of a malignancy. Cholesteatomas are collections of desquamating stratified squamous epithelium found in the middle ear or mastoid air cells. Congenital cholesteatomas occur most frequently in children and young adults. Acquired cholesteatomas originate from perforation or retraction of the TM allowing migration of epithelium into the middle ear. SN - PB - McGraw-Hill CY - New York, NY Y2 - 2024/03/29 UR - accessmedicine.mhmedical.com/content.aspx?aid=1181040006 ER -