title: [Radiological aspects of acoustic neurinoma].
abstract: For a long time CT constituted the technique of choice for the investigation and pretreatment staging of acoustic neuroma. It is sometimes inadequate especially for defining the extra-axial site of a tumour or for identifying small lesions. Today, any case of suspected acoustic neuroma should undergo first-line MR studies. MR identifies almost all extra-axial lesions, clearly visualises small lesions and provides a satisfactory pretreatment staging in the majority of cases, acoustic neuroma presents a signal intensity identical to or lower than that of the brainstem with a high intensity signal on T2-weighted SE sequences and post-gadolinium T1-weighted SE sequences, generally with a mixed intra- and extra-meatal location and eccentric in relation to the anterior border of the porus.
authors.affiliation: Service de Radiologie, HIA du Val-de-Grâce, Paris.
authors.forename: D
authors.initials: D
authors.lastname: Jeanbourquin
authors.forename: E
authors.initials: E
authors.lastname: Le Marec
authors.forename: G
authors.initials: G
authors.lastname: Galidie
mesh_terms: D006801:Humans; D008279:Magnetic Resonance Imaging; D009464:Neuroma, Acoustic / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011859:Radiography
vernacular_title: Les aspects radiologiques du neurinome du VIII.