Abstract
Purpose
To evaluate the value of gadobenate dimeglumine–enhanced MRI in predicting the pathologic grade of hepatocellular carcinoma (HCC).
Materials and methods
Patients with pathologically proven HCC who underwent preoperative gadobenate dimeglumine–enhanced dynamic MRI were included. Two radiologists blinded to pathology results evaluated images in consensus. Lesions were evaluated quantitatively in terms of ratio of enhancement (RE), and qualitatively based on image features related to tumor aggressiveness. Logistic regression and ROC analyses were used to determine the value of these parameters to predict pathologic grade.
Results
In total, 221 patients (194 males, 27 females, aged 52.9 ± 11.7 years) with 49 poorly differentiated HCCs and 172 well/moderately differentiated HCCs were evaluated. Features significantly related to poorer pathologic grade at univariate analysis included lower RE in the early arterial phase (EAP) (p = 0.001), nonsmooth margins (p = 0.001), absence of capsule (p < 0.001), arterial peritumoral hyperenhancement (p < 0.001), higher AFP (p = 0.004), multiple tumors (p = 0.026), and larger tumor size (p = 0.028). At multivariate analysis, lower RE (EAP) (OR = 0.144, p = 0.002), absence of capsule (OR = 0.281, p = 0.004), and arterial peritumoral hyperenhancement (OR = 4.117, p < 0.001) were independent predictive factors for poorer pathologic grade. ROC analysis showed lower RE (EAP) was predictive of poorer pathologic grade (AUC = 0.667). AUC increased to 0.797 when combined with absence of capsule and presence of peritumoral hyperenhancement.
Conclusions
Lower RE (EAP), absence of capsule, and arterial peritumoral hyperenhancement were predictive biomarkers for poorer pathologic grade of HCC on gadobenate dimeglumine–enhanced dynamic MRI.
Key Points
• Gadobenate dimeglumine–enhanced dynamic MRI was a useful quantitative biomarker for preoperative prediction of pathologic grade in patients with HCC.
• Lower RE in the early arterial phase, absence of capsule, and arterial peritumoral hyperenhancement were potential imaging indicators for preoperative prediction of poorer pathologic grade of HCC on gadobenate dimeglumine–enhanced MRI.
• A lower RE in the early arterial phase was effective at predicting poorer pathologic grade of HCCs but prediction is improved when combined with absence of capsule and presence of peritumoral hyperenhancement.
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Abbreviations
- AP:
-
Arterial phase
- DCE:
-
Dynamic contrast enhancement
- DP:
-
Delayed phase
- EAP:
-
Early arterial phase
- EPVP:
-
Early portal venous phase
- HBP:
-
Hepatobiliary phase
- HCC:
-
Hepatocellular carcinoma
- LAP:
-
Late arterial phase
- LPVP:
-
Late portal venous phase
- MD:
-
Moderate differentiation
- PD:
-
Poor differentiation
- PVP:
-
Portal venous phase
- RE:
-
Ratio of enhancement
- SBRT:
-
Stereotactic body radiation therapy
- SI:
-
Signal intensity
- TACE:
-
Transarterial chemoembolization
- TARE:
-
Transarterial radioembolization
- WD:
-
Well differentiation
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Funding
The authors state that this study has received funding by the National Natural Science Foundation of China grant 91959118 (JW), Science and Technology Program of Guangzhou, China grant 201704020016 (JW), SKY Radiology Department International Medical Research Foundation of China Z-2014-07-1912-15 (JW), Clinical Research Foundation of the 3rd Affiliated Hospital of Sun Yat-Sen University YHJH201901 (JW), and Key Research and Development Program of Guangdong Province 2019B020235002 (JW).
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The scientific guarantor of this publication is Jin Wang.
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•Retrospective
•Diagnostic or prognostic study
•Performed at one institution
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Rong, D., Liu, W., Kuang, S. et al. Preoperative prediction of pathologic grade of HCC on gadobenate dimeglumine-enhanced dynamic MRI. Eur Radiol 31, 7584–7593 (2021). https://doi.org/10.1007/s00330-021-07891-0
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DOI: https://doi.org/10.1007/s00330-021-07891-0