title: [Hemifacial spasm: study using magnetic resonance angiography].
abstract: Nine patients with "idiopathic" hemifacial spasm were evaluated with cranial magnetic resonance imaging and angiography. Alterations of the posterior fossa vasculature, possibly related to the facial nerve irritation, were found in 8 patients (88%). Magnetic resonance angiography is a noninvasive procedure and appears to be a sensitive method to evaluate the hemifacial spasm etiology.
authors.affiliation: Divisão de Clínica Neurológica, Hospital das Clínicas, Faculdade de Medicina, USP.
authors.forename: M S
authors.initials: MS
authors.lastname: Bittar
authors.forename: C C
authors.initials: CC
authors.lastname: Staut
authors.forename: E R
authors.initials: ER
authors.lastname: Barbosa
authors.forename: L A
authors.initials: LA
authors.lastname: Bacheschi
authors.forename: A C
authors.initials: AC
authors.lastname: Magalhães
mesh_terms: D000328:Adult; D000368:Aged; D005152:Facial Muscles / Q000473:pathology* / Q000503:physiopathology; D005155:Facial Nerve Diseases / Q000150:complications / Q000175:diagnosis*; D005260:Female; D006801:Humans; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D009119:Muscle Contraction; D012680:Sensitivity and Specificity; D013035:Spasm / Q000175:diagnosis* / Q000209:etiology
vernacular_title: Espasmo hemifacial: estudo pela angiografia por ressonância magnética.