Hyperostosis of the internal auditory canal : An incidental finding?

In contrast to the fairly common exostoses in the external auditory canal, hyperostoses and osteomas of the internal auditory canal are extremely rare. In this case report we present a patient with sudden right-sided sensorineural hearing loss, in whom imaging revealed hyperostosis with bilateral st...

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Bibliographic Details
Published in:HNO 2015-07, Vol.63 (7), p.516
Main Authors: Mastromonaco, P, Stöckli, S
Format: Article
Language:ger
Subjects:
Diagnosis, Differential
Ear Canal - pathology
Ear, Inner
Female
Hearing Loss, Sensorineural - diagnosis
Hearing Loss, Sensorineural - etiology
Humans
Hyperostosis - complications
Hyperostosis - diagnosis
Incidental Findings
Magnetic Resonance Imaging - methods
Middle Aged
Nerve Compression Syndromes - diagnosis
Nerve Compression Syndromes - etiology
Petrous Bone - pathology
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Summary:In contrast to the fairly common exostoses in the external auditory canal, hyperostoses and osteomas of the internal auditory canal are extremely rare. In this case report we present a patient with sudden right-sided sensorineural hearing loss, in whom imaging revealed hyperostosis with bilateral stenosis of the internal auditory canal. Whether the connection of such radiological findings with dysfunction of cranial nerves VII and VIII be causal or coincidental is controversially discussed in the literature. Therefore, the indication for surgical intervention should be considered with extreme caution. Despite examination of our radiology database comprising almost 1000 MRI/CT temporal bone investigations, we could find no other cases of hyperostosis of the petrous bone. This case thus represents a rare disease, which should be considered a differential diagnosis.
ISSN:1433-0458
DOI:10.1007/s00106-014-2910-9