Abstract
Objectives
To evaluate whether the change in volumetric ADC (vADC) and volumetric venous enhancement (vVE) after transarterial chemoembolization (TACE) can predict the histologic grading of hepatocellular carcinoma (HCC).
Materials and methods
This HIPPA-compliant retrospective study was approved by our institutional review board. The study population included 106 HCC patients (147 index lesions) who had MR imaging within 3 months before and after TACE and pathologic report of the HCC either by biopsy or liver transplantation/resection between 2001 and 2017. Volumetric measurements of venous enhancement (VE) and apparent diffusion coefficient (ADC) were performed on baseline and post-TACE MRI. The tumors were histologically classified into two low-grade and high-grade groups. The parameters between two groups were compared using bivariate and multivariate analyses.
Results
Median change in vADC, vVE, and absolute vADC skewness after TACE was higher in low-grade HCCs as compared with high-grade HCCs (p < 0.001, p = 0.005, p = 0.04, respectively). Combining ΔvADC, ΔvVE, and the etiology for background liver disease in multivariate analysis had the highest accuracy in distinguishing high-grade tumors (AUC = 91%).
Conclusion
ΔvADC and ΔvVE after TACE are potential predictors of HCC histopathological grading. Combining functional MRI biomarkers with the etiology of liver disease can enhance the accuracy in assessing degree of differentiation.
Key Points
• Change in volumetric functional MRI biomarkers after TACE can be a non-invasive method to evaluate tumor histopathology in HCC.
• The etiology of background liver disease might be a predictor of tumor degree of differentiation.
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Abbreviations
- ADC:
-
Apparent diffusion coefficient
- AUC:
-
Area under the curve
- DWI:
-
Diffusion-weighted MRI
- HCC:
-
Hepatocellular carcinoma
- IQR:
-
Interquartile range
- MRI:
-
Magnetic resonance imaging
- PVP:
-
Portal venous phase
- ROC:
-
Receiver operating characteristics
- vADC:
-
Volumetric ADC
- vVE:
-
Volumetric venous enhancement
- ΔvADC:
-
Change in volumetric ADC after TACE
- ΔvVE:
-
Change in volumetric VE after TACE
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The scientific guarantor of this publication is Dr. Ihab R. Kamel.
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Only if the study is on human subjects. Written informed consent was waived by the Institutional Review Board.
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• retrospective
• cross-sectional study
• performed at one institution
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Ameli, S., Shaghaghi, M., Ghasabeh, M.A. et al. Does the change in volumetric functional MR metrics post-TACE predict histopathologic grading of hepatocellular carcinoma?. Eur Radiol 30, 6709–6720 (2020). https://doi.org/10.1007/s00330-020-07052-9
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DOI: https://doi.org/10.1007/s00330-020-07052-9