MAGNETIC-RESONANCE FINDINGS IN 92-ACOUSTIC-NEUROMAS

被引：16

作者：

DUVOISIN, B

FERNANDES, J

DOYON, D

DENYS, A

STERKERS, JM

BOBIN, S

机构：

[1] Department of Oto-Rhino-Laryngology, University Hospital of Bicetre, Le Kremlin Bicetre

[2] Oto-Rhino-Laryngology, Hospital Cochin Paris, Lausanne

[3] Diagnostic Radiology, University Hospital CHUV, Lausanne

来源：

EUROPEAN JOURNAL OF RADIOLOGY | 1991年 / 13卷 / 02期

关键词：

MAGNETIC RESONANCE IMAGING; BRAIN; ACOUSTIC NEUROMA; MRI; NEOPLASM;

D O I：

10.1016/0720-048X(91)90088-D

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

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 (> 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.

引用

页码：96 / 102

页数：7

共 29 条

[1]

Ramsden, Acoustic tumors, Scott-Brown's Otolaryngology, pp. 500-533, (1987)

[2]

Thomsen, Tos, Acoustic neuroma: clinical aspects, audiovestibular assessment, diagnostic delay, and growth rate, Am J Otol, 11, pp. 12-19, (1990)

[3]

Portmann, Dauman, Duriez, Portmann, Dhillon, Modern diagnostic strategy for acoustic neuroma, Arch Otorhinolaryngol, 246, pp. 286-291, (1989)

[4]

Windle-Taylor, Dhillon, Kenyon, Morrisson, Acoustic neuroma suspicion index: an aid to investigation and diagnosis, Laryngoscope, 94, pp. 1464-1467, (1984)

[5]

Moffat, Hardy, Early diagnosis and surgical treatment of acoustic neuroma: is it cost effective, J R Soc Med, 82, pp. 329-332, (1989)

[6]

Sarrat, Zanaret, Triglia, Koskas, Giraud, Cannoni, Pech, Chevrot, Le diagnostic radiologique du neurinome de l'acoustique. A propos de 130 patients, J Radiol, 66, pp. 31-37, (1985)

[7]

Barrs, Luxford, Becker, Brackmann, Computed tomography with gas cisternography for detection of small acoustic tumors, Arch Otolaryngol, 110, pp. 535-537, (1984)

[8]

Wu, Tang, Zhang, CT in diagnosis of acoustic neuromas, AJNR, 7, pp. 645-650, (1986)

[9]

Randell, Collins, Young, Haywood, Thomas, McDonnel, Orr, Bydder, Steiner, Nuclear magnetic resonance imaging of posterior fossa tumors, AJR, 141, pp. 489-496, (1983)

[10]

Armington, Harnsberger, Smoker, Osborn, Normal and diseased acoustic pathway: evaluation with MR imaging, Radiology, 167, pp. 509-515, (1988)

← 1 2 3 →