Bilateral osteomas and exostoses of the internal auditory canal

Schutt, Christopher A.; Guo, Jiyu; Bagwell, Kenneth; Bulsara, Ketan R.; Malhotra, Ajay; Michaelides, Elias

doi:10.1016/j.amjoto.2015.03.006

Cited by 9 publications

(18 citation statements)

References 17 publications

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“…7 In contrast, exostoses appear as multiple broad-based, smooth, and elevated lesions, which arise from the tympanic portion of the temporal bone. 3,7 Histologically, osteomas have fibrovascular channels with surrounding lamellar bone and few osteocytes. 4,5 In contrast, exostoses appear as concentric and dense layers of parallel subperiosteal bone with many osteocytes and no fibrovascular channels.…”

Section: Discussionmentioning

confidence: 99%

“…Bilateral presence of either of these lesions is exceedingly rare, with only 13 cases reported. [1][2][3][4][5][6][7] To better address the existing knowledge gap regarding IAC exostoses and osteomas, we review the relevant pathophysiology and treatment strategies.…”

Section: Discussionmentioning

confidence: 99%

“…1 Internal acoustic canal (IAC) osteomas and exostoses are exceedingly rare, with only a small number of reports existing in the literature. [1][2][3][4][5][6][7] Although histologically distinct, both lesions can present with hyperostotic growth adjacent to the IAC resulting in compression of neurovascular structures. These patients often present with sensorineural hearing loss, vertigo, and/ or tinnitus, caused by compression of neurovascular structures within the cerebellopontine angle.…”

Section: Introductionmentioning

confidence: 99%

“…These patients often present with sensorineural hearing loss, vertigo, and/ or tinnitus, caused by compression of neurovascular structures within the cerebellopontine angle. 2,3 Radiographic imaging is not consistently reliable in differentiating these two lesions, and frequently histopathology is necessary for the final diagnosis. Once radiographic evidence confirms a symptomatic lesion, surgical decompression of neurovascular structures is considered to prevent further progression of symptoms.…”

Section: Introductionmentioning

confidence: 99%

“…2,4 To date, only 26 cases of exostoses and/or osteomas resulting in stenosis of the IAC have been reported. [1][2][3][4][5][6][7] Clinical outcomes following surgery are variable, and the likelihood of neurological stability or recovery have not been previously explored in this population. We present our institutional series treating two patients with bilateral IAC exostoses, and summarize the existing literature on the histopathology, radiographic characteristics, and treatment strategies for these rare lesions.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Internal Acoustic Canal Stenosis Due to Hyperostosis

Goodarzi

Toussi

Garza

et al. 2019

J Neurol Surg B Skull Base

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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.

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Section: Discussionmentioning

confidence: 99%