title: Bilateral osteomas arising from the internal auditory canal: case report.
abstract: OBJECTIVE
  Osteomas arising from the internal auditory canal and developing in the cerebellopontine angle have rarely been reported. We present the first case of bilateral osteomas in this region and describe our management strategy.
  
  
  METHODS
  A 30-year-old woman presented with strong vertigo, tinnitus, and hypacusis on the left side. Brain magnetic resonance imaging and computed tomographic scans displayed bilateral cerebellopontine angle osteomas arising from the internal auditory canal. The larger tumor on the left side was found to be compressing the vestibulocochlear nerve.
  
  
  METHODS
  Surgery was performed on the symptomatic side via the retrosigmoid approach, and the tumor was removed completely. The vertigo resolved completely after surgery, and the patient had no further tinnitus attacks. An audiogram showed slightly improved hearing with a mean of 20 dB in the main speech area.
  
  
  CONCLUSIONS
  Osteomas should be considered in patients with bilateral cerebellopontine angle tumors. Surgical removal might provide resolution of symptoms.
authors.affiliation: International Neuroscience Institute-Hannover, Hannover, Germany. vgerganov@gmail.com
authors.forename: Venelin M
authors.initials: VM
authors.lastname: Gerganov
authors.forename: Amir
authors.initials: A
authors.lastname: Samii
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Paterno
authors.forename: Alexandru C
authors.initials: AC
authors.lastname: Stan
authors.forename: Madjid
authors.initials: M
authors.lastname: Samii
mesh_terms: D000328:Adult; D001859:Bone Neoplasms / Q000150:complications / Q000473:pathology* / Q000601:surgery; D002530:Cerebellopontine Angle / Q000473:pathology* / Q000601:surgery; D007758:Ear, Inner / Q000473:pathology* / Q000601:surgery; D005260:Female; D007839:Functional Laterality; D006801:Humans; D010016:Osteoma / Q000150:complications / Q000473:pathology* / Q000601:surgery; D014012:Tinnitus / Q000209:etiology; D014717:Vertigo / Q000209:etiology