Magnetic resonance findings in 92 acoustic neuromas

Détails

ID Serval
serval:BIB_CC06E33D0168
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Magnetic resonance findings in 92 acoustic neuromas
Périodique
European Journal of Radiology
Auteur(s)
Duvoisin  B., Fernandes  J., Doyon  D., Denys  A., Sterkers  J. M., Bobin  S.
ISSN
0720-048X
Statut éditorial
Publié
Date de publication
10/1991
Peer-reviewed
Oui
Volume
13
Numéro
2
Pages
96-102
Notes
Duvoisin, B Fernandes, J Doyon, D Denys, A Sterkers, J M Bobin, S Netherlands European journal of radiology Eur J Radiol. 1991 Sep-Oct;13(2):96-102. --- Old month value: Sep-Oct
Résumé
A retrospective analysis of the MR findings in 92 cases of acoustic neuromas is presented. The method of examination included in all cases intravenous injection of Gadolinium (Gd-DTPA or DOTA) with realization of sections in the axial and coronal planes. In 21 cases native MR studies were performed in the axial plane, before Gadolinium injection, with T1WI (n = 21), and T2WI (n = 6) images. Tumors were strictly intracanalar in 19 cases (20.7%), only localized in the cerebellopontine angle (CPA) in 5 cases (5.4%), and in 68 cases (73.9%) the tumors had intra- and extracanalar components. In this last group of lesions, 63.2% completely filled the internal auditory canal (IAC), and 36.8% occupied the internal portion of the IAC. In most cases (85.3%) the mean diameter of the CPA component was less than or equal to 2.5 cm. Lesions were more frequently homogeneous (58.8%) after Gd i.v.-enhancement. Heterogeneity was noted mainly in large lesions (greater than 2.5 cm: 100%). In all cases but one, the tumors were round, or oval-shaped, well-delineated, and did not present significant contact with the petrous bone. In 80.9% of CPA lesions, the center of the tumor was posteriorly excentered in relation to the internal auditory canal, whereas it was centered in 16.2% of cases. Widening of the IAC was observed in 51.1% of cases. In 45.2% of tumors of the CPA, smoothing of the posterior edge of the porus was visible.
Mots-clé
Adolescent Adult Aged Aged, 80 and over Cerebellar Neoplasms/*diagnosis/radiography *Cerebellopontine Angle Ear Neoplasms/*diagnosis/radiography Female Humans Labyrinth Diseases/*diagnosis/radiography *Magnetic Resonance Imaging Male Middle Aged Neoplasm Recurrence, Local Neurofibromatosis 2/diagnosis Neuroma, Acoustic/*diagnosis/radiography Retrospective Studies Tomography, X-Ray Computed
Pubmed
Web of science
Création de la notice
11/04/2008 12:51
Dernière modification de la notice
03/03/2018 21:27
Données d'usage