Differentiation of Cerebellopontine Angle Neuromas and Meningiomas with MR Imaging

Mikhael, Michael A.; Cirić, Ivan; Wolff, Allan P.

doi:10.1097/00004728-198509000-00002

Cited by 59 publications

(13 citation statements)

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“…DISCUSSION Our results suggest that the finding of a high-signalintensity lesion at the CPA on r 2 -weighted sequences is against the diagnosis of a meningioma. This is at variance with a recent report which found signal intensity to be of no value in differentiating meningiomas from neurilemmomas (Mikhael et al, 1985). That report, however, looked at only two meningiomas and is not supported by other workers, who have shown meningiomas to be unusual in comparison with other tumours in having relatively short T x and T 2 times (Bydder & Young, 1985).…”

Section: Resultscontrasting

confidence: 59%

Magnetic resonance imaging of the cerebello-pontine angle

Mawhinney¹,

Buckley²,

Worthington³

1986

BJR

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A variety of extra-axial lesions occurring at the cerebello-pontine angle was examined by magnetic resonance imaging (MRI). Differences in spin sequence characteristics were found between neurilemmomas and meningiomas, with neurilemmomas exhibiting a greater increase in T2 than meningiomas. The T1 images were of less value in differentiating between neurilemmomas and meningiomas but were of value in the diagnosis of vascular lesions, due to the decreased T1 of blood clot. The T1 images were also of value in the assessment of tumour size and in the diagnosis of an epidermoid cyst. Extension of tumour into the internal auditory meatus was seen on MRI with acoustic neuromas and with one other lesion. The transverse perspective was of greatest value in lesion assessment. The coronal perspective was useful in certain situations but the sagittal perspective was of minimal clinical value.

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Section: Resultscontrasting

confidence: 59%

Magnetic resonance imaging of the cerebello-pontine angle

Mawhinney¹,

Buckley²,

Worthington³

1986

BJR

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“…The magnetic resonance imaging signal intensities of meningioma and acoustic neuroma are similar and the major differentiating feature is separation of the tumor and nerve complex. 9 Pappas et al'" believe that ossifying hemangioma is consistent with increased signal density on both Tl-and T2-weighted images, whereas lAC acoustic neuromas are best seen on T2 signals.…”

Section: Discussionmentioning

confidence: 98%

Calcification of Internal Auditory Canal Tumors

Atlas

Fagan²,

Turner³

1992

Ann Otol Rhinol Laryngol

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“…2,8 On the other hand, a sessile tumor with a broad base against petrous bone or tentorium, formation of an obtuse angle with the petrous temporal bone, homogeneous contrast enhancement, dural tail, intratumoral calcification, and hyperostotic changes all favor the diagnosis of a meningioma. 2,6,[8][9][10] Excluding hyperostosis, no other sign is considered specific to meningioma. 2 Furthermore, the dural tail sign has been observed in association with VS. 11 Hence, it is not surprising that in a recent study, 25% of cases of CPA meningiomas were mistaken for VS. 3 Intratumoral microhemorrhages identified on T2*-weighted GRE sequence in VS seem to hold diagnostic potential to distinguish VS from meningiomas.…”

Section: Discussionmentioning

confidence: 99%