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• W2112598813 abstract "Purpose To compare in vivo 1H magnetic resonance (MR) spectra of preinvasive and invasive cervical lesions with ex vivo magic angle spinning (MAS) spectra of intact biopsies from the same subjects and to establish the effects of tumor load in the tissue sampled on the findings. Materials and Methods A total of 51 subjects (nine with normal cervix, 10 with cervical intraepithelial neoplasia [CIN], and 32 with cervical cancer) underwent endovaginal MR at 1.5 T. Single-voxel (3.4 cm3) 1H MR spectra were acquired and voxel tumor load was calculated (tumor volume within voxel as a percentage of voxel volume). Resonances from triglycerides –CH2 and –CH3 and choline-containing compounds (Cho) were correlated with voxel tumor load. Biopsies analyzed by 1H MAS-MR spectroscopy (MRS) had metabolite levels correlated with tumor load in the sample at histology. Results In vivo studies detected Cho in normal, CIN, and cancer patients with no significant differences in levels (P = 0.93); levels were independent of voxel tumor load. Triglyceride –CH2 and –CH3 signals in-phase with Cho were present in 77% and 29%, respectively, of cancer subjects (but not in normal women or those with CIN), but did not correlate with voxel tumor load. Ex vivo cancer biopsies showed levels of triglycerides –CH2 and –CH3 and of Cho that were significantly greater than in normal or CIN biopsies (P < 0.05); levels were independent of the tumor load in the sample. The presence of –CH2 in vivo predicted the presence of cancer with a sensitivity and specificity of 77.4% and 93.8% respectively, positive (PPV) and negative (NPV) predictive values were 96% and 68.2%; for –CH2 ex vivo, sensitivity was 100%; specificity, 69%; PPV, 82%; and NPV, 100%. Conclusion Elevated lipid levels are detected by MRS in vivo and ex vivo in cervical cancer and are independent of tumor load in the volume of tissue sampled. J. Magn. Reson. Imaging 2004;19:356–364. © 2004 Wiley-Liss, Inc." @default.
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• W2112598813 date "2004-01-01" @default.
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• W2112598813 title "1H magnetic resonance spectroscopy of preinvasive and invasive cervical cancer: In vivo-ex vivo profiles and effect of tumor load" @default.
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• W2112598813 doi "https://doi.org/10.1002/jmri.20012" @default.
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