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Intralabyrinthine schwannomas
D C Fitzgerald1, K M Grundfast, D A Hecht
1Department of Otology/Neurotology, Washington Hospital Center, DC 20010, USA.
Objective:
To describe characteristic features of intralabyrinthine schwannomas (ISs) that may be used to distinguish them from other otologic disorders with similar symptoms so that appropriate evaluation and management can be instituted.
Study Design:
This study was a retrospective case review.
Setting:
This study was conducted at a university-affiliated urban tertiary care medical center and a university medical center in the same city.
Patients:
Seven patients with ISs were included in this study.
Interventions:
Tumor removal versus observation and monitoring with periodic magnetic resonance imaging (MRI) scans was investigated.
Main Outcome Measures:
Hearing, vertigo, and tumor growth were measured.
Results:
Four of seven patients with ISs underwent surgical excision with no evidence of tumor recurrence. The remaining three patients are being followed-up with repeat MRI that has demonstrated minimal or no tumor growth.
Conclusions:
ISs can be detected in early stages if MRI is performed in patients with unilateral sensorineural hearing loss without vertiginous symptoms typical of Meniere's disease. Although complete surgical excision can be achieved readily with labyrinthectomy, observation and monitoring with rep--MRI is an option for some patients.