Intralabyrinthine schwannomas

Objective: To describe characteristic features of intralabyrinthine schwann omas (ISs) that may be used to distinguish them from other otologic disorde rs 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 periodi c 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 n o evidence of tumor recurrence. The remaining three patients are being foll owed-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 pat ients with unilateral sensorineural hearing loss without vertiginous sympto ms 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.