title: Cerebellar arteriovenous malformation with facial paralysis, hearing loss, and tinnitus: a case report.
abstract: OBJECTIVE
  To describe cerebellar arteriovenous malformation in a 21-year-old man with symptoms resembling those of ear disease and to discuss the relationship between the findings of neurotologic examination and magnetic resonance imaging.
  
  
  METHODS
  Case report.
  
  
  METHODS
  Department of Otolaryngology, Head-and-Neck Surgery of the Kyoto University Hospital, which is a tertiary care center, in Kyoto, Japan.
  
  
  METHODS
  A 21-year-old man had cerebellar arteriovenous malformation and symptoms resembling those of ear disease: recurrent left facial paralysis, left retrocochlear hearing loss, and tinnitus. Auditory brainstem responses showed only waves I and II on his left side. Downbeat nystagmus was seen by anteflexion and retroflexion of his neck. He also experienced a slight sensory disturbance on the left side of his face and right lower extremity. Magnetic resonance imaging and vertebral angiography revealed a cerebellar arteriovenous malformation and a varix functioning as a drainer of the arteriovenous malformation surrounded by an edematous region probably induced by a small hemorrhage in the brainstem.
  
  
  METHODS
  Conservative treatment, including intravenous prednisolone, vitamin B12, and oral adenosine triphosphate was performed followed by total extirpation of the arteriovenous malformation.
  
  
  CONCLUSIONS
  In examining patients with peripheral facial paralysis (sometimes recurrent with a short interval) and other symptoms resembling those of ear disease, especially those suggesting certain central disorders, it is important to take intracranial arteriovenous malformation into consideration because the condition may be sometimes life threatening if overlooked.
authors.affiliation: Department of Otolaryngology, Kobe City General Hospital, Japan. Masahiro.Kikuchi@ma2.seikyou.ne.jp
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kikuchi
authors.forename: Kazuo
authors.initials: K
authors.lastname: Funabiki
authors.forename: Seishi
authors.initials: S
authors.lastname: Hasebe
authors.forename: Haruo
authors.initials: H
authors.lastname: Takahashi
mesh_terms: D000328:Adult; D002150:Caloric Tests; D002531:Cerebellum / Q000033:anatomy & histology / Q000098:blood supply*; D016057:Evoked Potentials, Auditory, Brain Stem; D005158:Facial Paralysis / Q000175:diagnosis / Q000209:etiology*; D006319:Hearing Loss, Sensorineural / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D002538:Intracranial Arteriovenous Malformations / Q000150:complications* / Q000175:diagnosis; D008279:Magnetic Resonance Imaging; D008297:Male; D012438:Saccades; D012720:Severity of Illness Index; D014012:Tinnitus / Q000175:diagnosis / Q000209:etiology*