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Mesoscopic imaging of glioblastomas: Are diffusion, perfusion and spectroscopic measures influenced by the radiogenetic phenotype?

ABSTRACT: The purpose of this study was to identify markers from perfusion, diffusion, and chemical shift imaging in glioblastomas (GBMs) and to correlate them with genetically determined and previously published patterns of structural magnetic resonance (MR) imaging. Twenty-six patients (mean age 60 years, 13 female) with GBM were investigated. Imaging consisted of native and contrast-enhanced 3D data, perfusion, diffusion, and spectroscopic imaging. In the presence of minor necrosis, cerebral blood volume (CBV) was higher (median?±?SD, 2.23%?±?0.93) than in pronounced necrosis (1.02%?±?0.71), p_corr?=?0.0003. CBV adjacent to peritumoral fluid-attenuated inversion recovery (FLAIR) hyperintensity was lower in edema (1.72%?±?0.31) than in infiltration (1.91%?±?0.35), p_corr?=?0.039. Axial diffusivity adjacent to peritumoral FLAIR hyperintensity was lower in severe mass effect (1.08*10^-3 mm²/s?±?0.08) than in mild mass effect (1.14*10^-3 mm²/s?±?0.06), p_corr?=?0.048. Myo-inositol was positively correlated with a marker for mitosis (Ki-67) in contrast-enhancing tumor, r?=?0.5, p_corr?=?0.0002. Changed CBV and axial diffusivity, even outside FLAIR hyperintensity, in adjacent normal-appearing matter can be discussed as to be related to angiogenesis pathways and to activated proliferation genes. The correlation between myo-inositol and Ki-67 might be attributed to its binding to cell surface receptors regulating tumorous proliferation of astrocytic cells.

SUBMITTER: Demerath T

PROVIDER: S-EPMC5564334 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature

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Mesoscopic imaging of glioblastomas: Are diffusion, perfusion and spectroscopic measures influenced by the radiogenetic phenotype?

Demerath Theo T Simon-Gabriel Carl Philipp CP Kellner Elias E Schwarzwald Ralf R Lange Thomas T Heiland Dieter Henrik DH Reinacher Peter P Staszewski Ori O Mast Hansjörg H Kiselev Valerij G VG Egger Karl K Urbach Horst H Weyerbrock Astrid A Mader Irina I

The neuroradiology journal 20161119 1

The purpose of this study was to identify markers from perfusion, diffusion, and chemical shift imaging in glioblastomas (GBMs) and to correlate them with genetically determined and previously published patterns of structural magnetic resonance (MR) imaging. Twenty-six patients (mean age 60 years, 13 female) with GBM were investigated. Imaging consisted of native and contrast-enhanced 3D data, perfusion, diffusion, and spectroscopic imaging. In the presence of minor necrosis, cerebral blood volu ...[more]

PMID: 27864578

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Mesoscopic imaging of glioblastomas: Are diffusion, perfusion and spectroscopic measures influenced by the radiogenetic phenotype?

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Mesoscopic imaging of glioblastomas: Are diffusion, perfusion and spectroscopic measures influenced by the radiogenetic phenotype?

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