RT Book, Section A1 Chang, C.Y. Joseph A2 Lalwani, Anil K. SR Print(0) ID 55771372 T1 Chapter 50. Cholesteatoma T2 CURRENT Diagnosis & Treatment in Otolaryngology—Head & Neck Surgery, 3e YR 2012 FD 2012 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-162439-8 LK accessmedicine.mhmedical.com/content.aspx?aid=55771372 RD 2024/04/19 AB Squamous epithelium in the middle ear or mastoidOtorrhea and conductive hearing lossRetraction of the tympanic membrane with a squamous debris collection or a whitish mass behind an intact tympanic membraneTesting includes computed tomography (CT) scanning, which can be useful in delineating disease extent but is not critical to making a diagnosis in most cases