title: Recurrence of acoustic neuroma after incomplete resection.
abstract: OBJECTIVE
  To determine the risk of recurrent tumor in patients after incomplete resection of acoustic neuroma.
  
  
  METHODS
  Retrospective case review.
  
  
  METHODS
  A tertiary referral center.
  
  
  METHODS
  Thirty-nine patients were identified who underwent incomplete resection of acoustic neuroma between January 1988 and December 1993, and had a minimum follow-up of 3.5 years, at a mean of 6.2 years (range 3.5-10.2 years).
  
  
  METHODS
  Regular follow-up. using either computed axial tomography or magnetic resonance imaging yearly.
  
  
  METHODS
  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.
  
  
  CONCLUSIONS
  This study suggests that incomplete resection of acoustic neuroma is associated with a significant risk of recurrent tumor requiring subsequent intervention.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, The University of Michigan, Ann Arbor, USA.
authors.forename: H K
authors.initials: HK
authors.lastname: El-Kashlan
authors.forename: H
authors.initials: H
authors.lastname: Zeitoun
authors.forename: H A
authors.initials: HA
authors.lastname: Arts
authors.forename: J T
authors.initials: JT
authors.lastname: Hoff
authors.forename: S A
authors.initials: SA
authors.lastname: Telian
mesh_terms: D000328:Adult; D000368:Aged; D005154:Facial Nerve / Q000503:physiopathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D016518:Neurofibromatosis 2 / Q000175:diagnosis; D009464:Neuroma, Acoustic / Q000601:surgery*; D013506:Otologic Surgical Procedures / Q000379:methods*; D012008:Recurrence; D012189:Retrospective Studies; D016879:Salvage Therapy / Q000379:methods*; D012720:Severity of Illness Index; D013997:Time Factors