The contribution of diffusion-weighted MR imaging to distinguishing typical from atypical meningiomas

Hakyemez, Bahattin; Yıldırım, Nalan; Gökalp, Gökhan; Erdoğan, Cüneyt; Parlak, Müfıt

doi:10.1007/s00234-006-0094-z

Cited by 112 publications

(84 citation statements)

References 14 publications

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“…They are more common in older age and in females [1]. Although they are generally benign tumors, up to 10% of meningiomas are atypical or malignant [3]. MRI is a key modality not only for lesion diagnosis, but also to evaluate the extension, type and grade of the tumor.…”

Section: Introductionmentioning

confidence: 99%

ADC is not reliable in determinating subtypes of meningiomas

Ignjatović

Stojanov²,

Stojanović³

et al. 2014

Open Medicine

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Section: Introductionmentioning

confidence: 99%

ADC is not reliable in determinating subtypes of meningiomas

Ignjatović

Stojanov²,

Stojanović³

et al. 2014

Open Medicine

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“…It has been proposed that the higher collagen density in the extracellular space of hard tumors could decrease diffusion and result in lower ADC values (20).…”

Section: Discussionmentioning

confidence: 99%

Is There Any Congruity Between Tumor Consistency in Pituitary Macroadenomas and Preoperative Diffusion Weighted Imaging and Apparent Diffusion Coefficient (ADC) Map?

et al. 2017

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Background: Pituitary adenomas are the most common space-occupying lesions in the sellar region. Pituitary adenomas are usually soft, but 5 to 13% of macroadenomas are fibrous. The resection of firm tumors by curettage or suction is challenging. Therefore, preoperative knowledge of the pituitary adenomas consistency could help neurosurgeons plan more appropriate surgical procedures. In this regard, predicting fibrous adenomas by magnetic resonance imaging (MRI) is typically difficult and the results are controversial. We evaluated the correlation of pituitary adenoma consistency during tumor resection with preoperative diffusionweighted images (DWI) findings and apparent diffusion coefficient (ADC) values.

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“…DWI plays no role in the diagnosis of typical meningiomas and indeed can be somewhat variable [43]. DWI may, however, be useful to differentiate typical meningiomas from atypical and malignant meningiomas that account for approximately 9.6% of all meningiomas and are much more likely to recur [43].…”

Section: Neoplastic Typically Benign Meningiomamentioning

confidence: 99%

“…DWI may, however, be useful to differentiate typical meningiomas from atypical and malignant meningiomas that account for approximately 9.6% of all meningiomas and are much more likely to recur [43]. Making the distinction with conventional MRI alone can be challenging because worrisome features such as heterogeneity, perilesional oedema, irregular surface and invasion of adjacent structures can also be seen in typical meningiomas [44].…”

Section: Neoplastic Typically Benign Meningiomamentioning

confidence: 99%

“…Making the distinction with conventional MRI alone can be challenging because worrisome features such as heterogeneity, perilesional oedema, irregular surface and invasion of adjacent structures can also be seen in typical meningiomas [44]. However, several recent studies have found that atypical or malignant meningiomas can be reliably distinguished from typical meningiomas by their lower ADC values, a fact attributed in part to their increased cellularity [43,45,46].…”

Section: Neoplastic Typically Benign Meningiomamentioning

confidence: 99%

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“Dazed and diffused”: making sense of diffusion abnormalities in neurologic pathologies

O’Connor

Barest²,

Moritani³

et al. 2013

BJR

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To review diffusion abnormalities seen in diffusion-weighted MRI in neurological pathologies. We examine the clinical significance of the abnormalities in a broad spectrum of neurological diseases and highlight our current understanding of their causes. Diffusion abnormalities seen on diffusion-weighted MRI can play an important role in the diagnosis and follow-up of a broad spectrum of neurological diseases. A thorough understanding of the appearance and significance of these abnormalities is critical in patient management.Although the best known use of diffusion-weighted imaging (DWI) in MRI of the brain is detection of acute vaso-occlusive infarct, diffusion abnormalities occur in a wide spectrum of neurological pathologies. These diffusion abnormalities provide information that can directly affect the management of a patient, whether identifying pathology that would otherwise go unrecognised, narrowing a broad differential diagnosis, identifying conditions that require emergent intervention, evaluating response to treatment or providing prognostic information about a patient's expected clinical course. In this review, we explain the significance of diffusion abnormalities in a variety of neurological diseases and highlight our current understanding of the causes of these diffusion abnormalities.

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The contribution of diffusion-weighted MR imaging to distinguishing typical from atypical meningiomas

Abstract: Diffusion-weighted MR imaging findings of atypical/malignant meningiomas and typical meningiomas differ. Atypical/malignant meningiomas have lower intratumoral ADC values than typical meningiomas. Mean ADC values for peritumoral edema do not differ between typical and atypical meningiomas.

Cited by 112 publications

References 14 publications

ADC is not reliable in determinating subtypes of meningiomas

ADC is not reliable in determinating subtypes of meningiomas

Is There Any Congruity Between Tumor Consistency in Pituitary Macroadenomas and Preoperative Diffusion Weighted Imaging and Apparent Diffusion Coefficient (ADC) Map?

“Dazed and diffused”: making sense of diffusion abnormalities in neurologic pathologies

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