title: [Diagnosis of intracranial facial schwannoma: clinical, and radiological factors, and the value of immunohistochemistry].
abstract: OBJECTIVE
  To analyze the clinical, radiological, and pathological features which may be useful to differentiate intracranial schwannomas of the facial nerve from vestibular schwannomas.
  
  
  METHODS
  A retrospective study of 91 patients undergoing surgery with a clinical suspicion of vestibular schwannoma is presented. Clinical and radiological features are analyzed. Immunohistochemistry for neurofilaments was performed in selected cases of unilateral vestibular schwannomas, bilateral vestibular schwannomas, and facial nerve schwannomas.
  
  
  RESULTS
  Facial function was normal in 83% of patients with vestibular schwannoma. Both patients with facial schwannomas had preoperative House-Brackmann grade II facial function. MRI showed no main differences between facial and vestibular schwannomas. A positive immunostaining was found in unilateral vestibular schwannomas, bilateral vestibular schwannomas, and facial nerve schwannomas.
  
  
  CONCLUSIONS
  There are no specific clinical, radiological, or pathological factors to accurately differentiate schwannomas of the facial nerve from vestibular schwannomas.
authors.affiliation: Servicio de ORL, Hospital Universitario La Paz, Madrid. luislassaletta@wanadoo.es
authors.forename: L
authors.initials: L
authors.lastname: Lassaletta
authors.forename: A
authors.initials: A
authors.lastname: Castro
authors.forename: M
authors.initials: M
authors.lastname: Patrón
authors.forename: M J
authors.initials: MJ
authors.lastname: Sarriá
authors.forename: J
authors.initials: J
authors.lastname: Gavilán
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003390:Cranial Nerve Neoplasms / Q000000981:diagnostic imaging* / Q000378:metabolism* / Q000473:pathology; D005154:Facial Nerve / Q000000981:diagnostic imaging* / Q000378:metabolism* / Q000473:pathology; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009442:Neurilemmoma / Q000000981:diagnostic imaging* / Q000378:metabolism* / Q000473:pathology; D016900:Neurofilament Proteins / Q000378:metabolism*; D011859:Radiography; D012189:Retrospective Studies
chemical_list: D016900:Neurofilament Proteins