J Neurol Surg B
DOI: 10.1055/s-0039-1685530
Original Article
Georg Thieme Verlag KG Stuttgart · New York

Internal Acoustic Canal Stenosis Due to Hyperostosis

Amir Goodarzi
1  Department of Neurological Surgery, Davis School of Medicine, University of California, Sacramento, California, United States
,
Atrin Toussi
1  Department of Neurological Surgery, Davis School of Medicine, University of California, Sacramento, California, United States
,
Nicholas Garza
1  Department of Neurological Surgery, Davis School of Medicine, University of California, Sacramento, California, United States
,
Mirna Lechpammer
1  Department of Neurological Surgery, Davis School of Medicine, University of California, Sacramento, California, United States
2  Department of Pathology, Davis School of Medicine, University of California, Sacramento, California, United States
,
Hilary Brodie
3  Department of Otolaryngology/Head and Neck Surgery, Davis School of Medicine, University of California, Sacramento, California, United States
,
Rodney C. Diaz
3  Department of Otolaryngology/Head and Neck Surgery, Davis School of Medicine, University of California, Sacramento, California, United States
,
Kiarash Shahlaie
1  Department of Neurological Surgery, Davis School of Medicine, University of California, Sacramento, California, United States
› Author Affiliations
Further Information

Publication History

08 January 2019

11 March 2019

Publication Date:
22 April 2019 (online)

Abstract

Background Exostoses and osteomas are benign, insidious lesions of the bone involving the internal acoustic canal (IAC). We present two cases of IAC exostoses managed with surgical decompression and review the clinical outcomes of previously reported cases in the literature.

Methods A comprehensive search was conducted using PubMed Central, Web of Science Core Collection, and Google Scholar databases to identify previous reports of IAC exostoses and osteomas. A total of 26 reported cases were identified, and patient presenting symptoms, management strategies, and response to surgery was obtained when available.

Results Of the 13 patients who underwent surgical decompression, 8 patients had resolution of vertigo symptoms, 10 patients had improvement of tinnitus symptoms, and all patients maintained some level of serviceable hearing.

Conclusion IAC exostoses and osteomas are rare lesions that lead to insidious onset of debilitating symptoms from vestibulocochlear nerve dysfunction. Although the role of surgical decompression remains unclear, it appears that patients presenting with vertigo have more favorable response to surgical decompression as compared with those presenting with tinnitus and sensorineural hearing loss.

Disclosures

The authors have no conflicts of interest concerning the materials used in this study or the findings specified in this paper.