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AJR Am J Roentgenol. 2010 Dec;195(6):1391-5. doi: 10.2214/AJR.10.4531.

Correlation of diffusion and perfusion MRI with Ki-67 in high-grade meningiomas.

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  • 1Department of Imaging Sciences, University of Rochester Medical Center, 601 Elmwood Ave., Rochester, NY 14620, USA. ginatd01@gmail.com

Abstract

OBJECTIVE:

Atypical and anaplastic meningiomas have a greater likelihood of recurrence than benign meningiomas. The risk for recurrence is often estimated using the Ki-67 labeling index. The purpose of this study was to determine the correlation between Ki-67 and regional cerebral blood volume (rCBV) and between Ki-67 and apparent diffusion coefficient (ADC) in atypical and anaplastic meningiomas.

MATERIALS AND METHODS:

A retrospective review of the advanced imaging and immunohistochemical characteristics of atypical and anaplastic meningiomas was performed. The relative minimum ADC, relative maximum rCBV, and specimen Ki-67 index were measured. Pearson's correlation was used to compare these parameters.

RESULTS:

There were 23 cases with available ADC maps and 20 cases with available rCBV maps. The average Ki-67 among the cases with ADC maps and rCBV maps was 17.6% (range, 5-38%) and 16.7% (range, 3-38%), respectively. The mean minimum ADC ratio was 0.91 (SD, 0.26) and the mean maximum rCBV ratio was 22.5 (SD, 7.9). There was a significant positive correlation between maximum rCBV and Ki-67 (Pearson's correlation, 0.69; p = 0.00038). However, there was no significant correlation between minimum ADC and Ki-67 (Pearson's correlation, -0.051; p = 0.70).

CONCLUSION:

Maximum rCBV correlated significantly with Ki-67 in high-grade meningiomas.

PMID:
21098200
[PubMed - indexed for MEDLINE]
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