Abstract
Pseudo-continuous arterial spin labeling (PCASL) can measure tumor blood flow (TBF) reliably. We investigated meningioma TBF using PCASL and assessed for any correlation with histopathological microvascular density (MVD) and the World Health Organization (WHO) classification. Conventional MRI with contrast T1-weighted images and PCASL were acquired with a 3 T scanner before surgery in 25 consecutive patients with meningiomas. Using the PCASL perfusion map, the mean and maximum TBF were calculated from regions of interest placed in the largest cross-sectional plane of each tumor. Tissue sections from 16 patients were stained with CD31 to evaluate MVD and were assigned a WHO classification. The TBFs were statistically compared with MVD and the histopathological meningioma subtypes. There were 16 meningothelial meningiomas, four angiomatous meningiomas, two fibrous meningiomas, one transitional meningioma, and two atypical meningiomas. We observed significant correlation between MVD and both mean and maximum TBF (p < 0.05). The mean and maximum TBF (meanTBF, maxTBF) in angiomatous meningiomas are significantly higher than that in non-angiomatous meningiomas (p < 0.05). PCASL is useful in assessing meningioma vascularity, and in differentiating angiomatous meningiomas from non-angiomatous meningiomas.
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Abbreviations
- PCASL:
-
Pseudo-continuous arterial spin labeling
- TBF:
-
Tumor blood flow
- MVD:
-
Microvascular density
- WHO:
-
World Health Organization
- T1WI:
-
T1-weighted images
- ASL:
-
Arterial spin labeling
- EPI:
-
Echo planar imaging
- MRA:
-
MR angiography
- MRI:
-
Magnetic resonance imaging
- DSA:
-
Digital subtraction angiography
- ECA:
-
External carotid artery
- ICA:
-
Internal carotid artery
- DWI:
-
Diffusion-weighted imaging
- FLAIR:
-
Fluid-attenuated inversion recovery
- TR:
-
Repetition time
- TE:
-
Echo time
- NEX:
-
Number of excitations
- RBW:
-
Receiver band width
- FOV:
-
Field of view
- ROI:
-
A region of interest
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The authors have no personal, financial, or institutional interest in any of the drugs, materials, or devices in the article.
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Shinichiro Koizumi and Naoto Sakai have contributed equally to this work.
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Koizumi, S., Sakai, N., Kawaji, H. et al. Pseudo-continuous arterial spin labeling reflects vascular density and differentiates angiomatous meningiomas from non-angiomatous meningiomas. J Neurooncol 121, 549–556 (2015). https://doi.org/10.1007/s11060-014-1666-0
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DOI: https://doi.org/10.1007/s11060-014-1666-0