Abstract
Intralabyrinthine schwannomas are rare tumors. It is difficult to diagnose them, and their hearing disturbance has not been sufficiently elucidated. Recently, however, the development of the imaging technology enables the diagnosis of intracochlear schwannoma before operation. We experienced a case of intracochlear schwannoma diagnosed with mild hearing loss. Pure tone audiometry (PTA) showed hearing loss at mid-frequency, with a mean threshold of 33.3 dB. Magnetic resonance imaging (MRI) revealed an abnormal lesion in the cochlea. Finally, PTA showed profound deafness and MRI revealed invasion of the schwannoma into the fundus of the internal auditory canal. Considering the progress and the results of audiometric examinations, hearing disturbance by intracochlear schwannoma is investigated in this report.
Similar content being viewed by others
References
Vernick DM, Graham MD, McClatchey KD (1984) Intralabyrinthine schwannoma. Laryngoscope 94:1241–1243
Huang TS (1986) Primary intralabyrinthine schwannoma. Ann Otol Rhinol Laryngol 95:190–192
Sataloff RT, Roberts BR, Feldman M (1988) Intralabyrinthine schwannoma. Am J Otol 9:323–326
Kronenberg J, Horowitz Z, Hildesheimer M (1999) Intracochlear schwannoma and cochlear implantation. Ann Otol Rhinol Laryngol 108:659–660
Ohtani I, Suzuki C, Aikawa T (1990) Temporal bone pathology in intracochlear schwannoma with profound hearing loss. Auris Nasus Larynx 17:17–22
Gersdorff MC, Decat M, Duprez T, Deggouj N (1996) Intracochlear schwannoma. Eur Arch Otorhinolaryngol 253:374–376
Green JD Jr, McKenzie JD (1999) Diagnosis and management of intralabyrinthine schwannomas. Laryngoscope 109:1626–1631
Donnelly MJ, Daly CA, Briggs RJ (1994) MR imaging features of an intracochlear acoustic schwannoma. J Laryngol Otol 108:1111–1114
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Nishimura, T., Hosoi, H. Progressive hearing loss in intracochlear schwannoma. Eur Arch Otorhinolaryngol 265, 489–492 (2008). https://doi.org/10.1007/s00405-007-0483-x
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00405-007-0483-x