Recurrence of acoustic neuroma after incomplete resection

Objective: To determine the risk of recurrent turner in patients after incomplete resection of acoustic neuroma. Study Design: Retrospective case review. Setting: A tertiary referral center. Patients: Thirty-nine patients were identified who underwent incomplete resection of acoustic neuroma between January 1988 and December 1993, and hud a minimum follow-up of 3.5 years, at a mean of 6.2 years (range 3.5-10.2 years). Intervention: Regular follow-up, using either computed axial tomography or magnetic resonance imaging yearly. Main Outcome Measures: Growth of residual tumor as determined by the increase in its greatest dimension on follow-up imaging studies and the necessity for additional treatment. Results: Tumor regrowth occurred in 17 patients (44%). Ten patients (26%) required additional treatment during the follow up period. Conclusion: This study suggests that incomplete resection of acoustic neuroma is associated with a significant risk of recurrent tumor requiring subsequent intervention.