Artikel
Intralabyrinthine Schwannoma – a diagnostic dilemma?
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Autoren
Veröffentlicht: | 22. September 2005 |
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Gliederung
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Objective: We outline the diagnosis and management of intralabyrinthine schwannomas and hope proposing a guideline to the treatment policy for patients.
Methods/Case reports: Diagnosing two male patients, both after sudden hearing loss on their right ear ( pure tone audiogram, caloric testing, ABR, otoacoustic emissions, HR – MRI ), we found the presence of very small intralabyrinthine schwannomas.
The first patient, 44 years old, who showed normal hearing at the concerning (left) ear, but presenting a 3mm tumour projecting to the vestibule. The cochlea was patent.
Patient 2, 59 years old, showed severe hearing loss in high frequencies without vertigo. HR –MRI revealed a 3mm intracochlear schwannoma on this ear. ABR potentail were lost, caloric reaction was diminuished on the affected side
Conclusion: Intralabyrinthine schwannomas are uncommon tumours that mimic clinical features of many other neurootological conditions. Observation is an appropriate option for patients with serviceable hearing. In cases of vertigo a translabyrinthine or transotic approach can be used to remove the lesion. Our patients are recommended to perform regular MRI diagnostics according a wait-and-see policy.
References
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- Meyer O. Ein Fall von multiplen Tumoren in den Endausbreitungen des Akustikus. Z Ohrenheilkunde. 1917;75:95-113.
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- Neff BA, Willcox TO, Sataloff RT. Intralabyrinthine schwannomas. Otol Neurootol. 2003;24:299-307.