Magnetic resonance imaging of acoustic schwannomas.

C. M. Jeng, J. S. Huang, W. Y. Lee, Y. C. Wang, C. H. Kung, M. K. Lau

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The magnetic resonance imaging (MRI) findings of 27 histologically proven acoustic schwannomas in 24 patients (13 men, 11 women, age 20-79 yr) are described in detail. Three patients had bilateral tumors. Twenty-two tumors (82%) had intra- and extracanalicular components, three tumors (11%) were limited to the internal auditory canal (IAC) and two tumors (7%) were limited to the cerebellopontine angle (CPA). The diameters of extracanalicular lesions in the CPA ranged from 12 to 50 mm, and most of them were round in shape. All IAC portions of CPA tumors had a funnel-shaped appearance on the axial images and short-club-shaped configuration on the coronal images. There was strong homogeneous contrast enhancement of the solid components in 12 tumors (44%) and heterogeneous enhancement in 15 tumors (56%). The cystic components of the tumors correlated well with the histologic features. All tumors could be demonstrated in their enterity by MRI. The "short-club sign", first described in this study, helped to confirm the intracanalicular component of acoustic schwannomas, which were usually found in the cerebellar cistern. The results of this study show that MRI is a sensitive imaging modality for the assessment of acoustic schwannomas located at the CPA or IAC, or in both regions. MRI is non-invasive and does not involve ionizing radiation. It should be considered the imaging examination of choice to evaluate patients with suspected acoustic schwannomas.

Original languageEnglish
Pages (from-to)487-493
Number of pages7
JournalJournal of the Formosan Medical Association = Taiwan yi zhi
Volume94
Issue number8
Publication statusPublished - Aug 1 1995
Externally publishedYes

Fingerprint

Acoustic Neuroma
Magnetic Resonance Imaging
Cerebellopontine Angle
Neoplasms
Ionizing Radiation

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Jeng, C. M., Huang, J. S., Lee, W. Y., Wang, Y. C., Kung, C. H., & Lau, M. K. (1995). Magnetic resonance imaging of acoustic schwannomas. Journal of the Formosan Medical Association = Taiwan yi zhi, 94(8), 487-493.

Magnetic resonance imaging of acoustic schwannomas. / Jeng, C. M.; Huang, J. S.; Lee, W. Y.; Wang, Y. C.; Kung, C. H.; Lau, M. K.

In: Journal of the Formosan Medical Association = Taiwan yi zhi, Vol. 94, No. 8, 01.08.1995, p. 487-493.

Research output: Contribution to journalArticle

Jeng, CM, Huang, JS, Lee, WY, Wang, YC, Kung, CH & Lau, MK 1995, 'Magnetic resonance imaging of acoustic schwannomas.', Journal of the Formosan Medical Association = Taiwan yi zhi, vol. 94, no. 8, pp. 487-493.
Jeng, C. M. ; Huang, J. S. ; Lee, W. Y. ; Wang, Y. C. ; Kung, C. H. ; Lau, M. K. / Magnetic resonance imaging of acoustic schwannomas. In: Journal of the Formosan Medical Association = Taiwan yi zhi. 1995 ; Vol. 94, No. 8. pp. 487-493.
@article{852c7162b50847a893ace3deb67ec750,
title = "Magnetic resonance imaging of acoustic schwannomas.",
abstract = "The magnetic resonance imaging (MRI) findings of 27 histologically proven acoustic schwannomas in 24 patients (13 men, 11 women, age 20-79 yr) are described in detail. Three patients had bilateral tumors. Twenty-two tumors (82{\%}) had intra- and extracanalicular components, three tumors (11{\%}) were limited to the internal auditory canal (IAC) and two tumors (7{\%}) were limited to the cerebellopontine angle (CPA). The diameters of extracanalicular lesions in the CPA ranged from 12 to 50 mm, and most of them were round in shape. All IAC portions of CPA tumors had a funnel-shaped appearance on the axial images and short-club-shaped configuration on the coronal images. There was strong homogeneous contrast enhancement of the solid components in 12 tumors (44{\%}) and heterogeneous enhancement in 15 tumors (56{\%}). The cystic components of the tumors correlated well with the histologic features. All tumors could be demonstrated in their enterity by MRI. The {"}short-club sign{"}, first described in this study, helped to confirm the intracanalicular component of acoustic schwannomas, which were usually found in the cerebellar cistern. The results of this study show that MRI is a sensitive imaging modality for the assessment of acoustic schwannomas located at the CPA or IAC, or in both regions. MRI is non-invasive and does not involve ionizing radiation. It should be considered the imaging examination of choice to evaluate patients with suspected acoustic schwannomas.",
author = "Jeng, {C. M.} and Huang, {J. S.} and Lee, {W. Y.} and Wang, {Y. C.} and Kung, {C. H.} and Lau, {M. K.}",
year = "1995",
month = "8",
day = "1",
language = "English",
volume = "94",
pages = "487--493",
journal = "Journal of the Formosan Medical Association",
issn = "0929-6646",
publisher = "Elsevier Science Publishers B.V.",
number = "8",

}

TY - JOUR

T1 - Magnetic resonance imaging of acoustic schwannomas.

AU - Jeng, C. M.

AU - Huang, J. S.

AU - Lee, W. Y.

AU - Wang, Y. C.

AU - Kung, C. H.

AU - Lau, M. K.

PY - 1995/8/1

Y1 - 1995/8/1

N2 - The magnetic resonance imaging (MRI) findings of 27 histologically proven acoustic schwannomas in 24 patients (13 men, 11 women, age 20-79 yr) are described in detail. Three patients had bilateral tumors. Twenty-two tumors (82%) had intra- and extracanalicular components, three tumors (11%) were limited to the internal auditory canal (IAC) and two tumors (7%) were limited to the cerebellopontine angle (CPA). The diameters of extracanalicular lesions in the CPA ranged from 12 to 50 mm, and most of them were round in shape. All IAC portions of CPA tumors had a funnel-shaped appearance on the axial images and short-club-shaped configuration on the coronal images. There was strong homogeneous contrast enhancement of the solid components in 12 tumors (44%) and heterogeneous enhancement in 15 tumors (56%). The cystic components of the tumors correlated well with the histologic features. All tumors could be demonstrated in their enterity by MRI. The "short-club sign", first described in this study, helped to confirm the intracanalicular component of acoustic schwannomas, which were usually found in the cerebellar cistern. The results of this study show that MRI is a sensitive imaging modality for the assessment of acoustic schwannomas located at the CPA or IAC, or in both regions. MRI is non-invasive and does not involve ionizing radiation. It should be considered the imaging examination of choice to evaluate patients with suspected acoustic schwannomas.

AB - The magnetic resonance imaging (MRI) findings of 27 histologically proven acoustic schwannomas in 24 patients (13 men, 11 women, age 20-79 yr) are described in detail. Three patients had bilateral tumors. Twenty-two tumors (82%) had intra- and extracanalicular components, three tumors (11%) were limited to the internal auditory canal (IAC) and two tumors (7%) were limited to the cerebellopontine angle (CPA). The diameters of extracanalicular lesions in the CPA ranged from 12 to 50 mm, and most of them were round in shape. All IAC portions of CPA tumors had a funnel-shaped appearance on the axial images and short-club-shaped configuration on the coronal images. There was strong homogeneous contrast enhancement of the solid components in 12 tumors (44%) and heterogeneous enhancement in 15 tumors (56%). The cystic components of the tumors correlated well with the histologic features. All tumors could be demonstrated in their enterity by MRI. The "short-club sign", first described in this study, helped to confirm the intracanalicular component of acoustic schwannomas, which were usually found in the cerebellar cistern. The results of this study show that MRI is a sensitive imaging modality for the assessment of acoustic schwannomas located at the CPA or IAC, or in both regions. MRI is non-invasive and does not involve ionizing radiation. It should be considered the imaging examination of choice to evaluate patients with suspected acoustic schwannomas.

UR - http://www.scopus.com/inward/record.url?scp=0029351785&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029351785&partnerID=8YFLogxK

M3 - Article

C2 - 7549578

AN - SCOPUS:0029351785

VL - 94

SP - 487

EP - 493

JO - Journal of the Formosan Medical Association

JF - Journal of the Formosan Medical Association

SN - 0929-6646

IS - 8

ER -