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Case Reports in Otolaryngology
Volume 2017, Article ID 4793786, 5 pages
Case Report

Large Cholesterol Granuloma of the Middle Ear Eroding into the Middle Cranial Fossa

Department of Otorhinolaryngology, Head and Neck Surgery, Aichi Medical University, Aichi, Japan

Correspondence should be addressed to Tessei Kuruma;

Received 4 February 2017; Revised 13 April 2017; Accepted 25 May 2017; Published 22 June 2017

Academic Editor: Harukazu Hiraumi

Copyright © 2017 Tessei Kuruma et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Background. Cholesterol granuloma of the middle ear is extremely rare in comparison to cholesterol granuloma of the petrous apex but sometimes shows an aggressive course. Case Report. We report herein a case involving a large, aggressive cholesterol granuloma of the middle ear that eroded the middle cranial fossa. A 64-year-old woman presented with pain in the left ear and hearing loss. Cholesterol granuloma was finally diagnosed from diffusion-weighted imaging, and cortical mastoidectomy was performed with canal wall down tympanoplasty type III. Recovery was uneventful recovery and the patient well at the 3-year follow-up. Conclusion. This case demonstrates the rare but clinically important pathology of aggressive cholesterol granuloma of the middle ear.