Abstract
Purpose
To evaluate the efficacy of MRI-based radiomics and clinical models in predicting MTM-HCC. Additionally, to investigate the ability of the radiomics model designed for MTM-HCC identification in predicting disease-free survival (DFS) in patients with HCC.
Methods
A total of 336 patients who underwent oncological resection for HCC between June 2007 and March 2021 were included. 127 patients in Cohort1 were used for MTM-HCC identification, and 209 patients in Cohort2 for prognostic analyses. Radiomics analysis was performed using volumes of interest of HCC delineated on pre-operative MRI images. Radiomics and clinical models were developed using Random Forest algorithm in Cohort1 and a radiomics probability (RP) of MTM-HCC was obtained from the radiomics model. Based on the RP, patients in Cohort2 were divided into a RAD-MTM-HCC (RAD-M) group and a RAD-non-MTM-HCC (RAD-nM) group. Univariate and multivariate Cox regression analyses were employed to identify the independent predictors for DFS of patients in Cohort2. Kaplan–Meier curves were used to compare the DFS between different groups pf patients based on the predictors.
Results
The radiomics model for identifying MTM-HCC showed AUCs of 0.916 (95% CI: 0.858–0.960) and 0.833 (95% CI: 0.675–0.935), and the clinical model showed AUCs of 0.760 (95% CI: 0.669–0.836) and 0.704 (95% CI: 0.532–0.843) in the respective training and validation sets. Furthermore, the radiomics biomarker RP, portal or hepatic vein tumor thrombus, irregular rim-like arterial phase hyperenhancement (IRE) and AFP were independent predictors of DFS in patients with HCC. The DFS of RAD-nM group was significantly higher than that of the RAD-M group (p < .001).
Conclusion
MR-based clinical and radiomic models have the potential to accurately diagnose MTM-HCC. Moreover, the radiomics signature designed to identify MTM-HCC also can be used to predict prognosis in patients with HCC, realizing the diagnostic and prognostic aims at the same time.
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Abbreviations
- HCC:
-
Hepatocellular carcinoma
- MTM-HCC:
-
Macrotrabecular-massive hepatocellular carcinoma
- DFS:
-
Disease-free survival
- IRE:
-
Irregular rim-like arterial phase hyperenhancement
- WHO:
-
World health organization
- AFP:
-
Alpha-fetoprotein
- RFA:
-
Radiofrequency ablation
- TACE:
-
Transarterial chemoembolization
- VOI:
-
Volume of interest
- AP:
-
Arterial phase
- PVP:
-
Portal venous phase
- ICC:
-
Inter/intra-observer coefficients
- LASSO:
-
Least absolute shrinkage and selection operator
- RF:
-
Random forest
- RP:
-
Radiomics probability
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by FC, YM, CF, XJ and JC. The first draft of the manuscript was written by FC and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Chai, F., Ma, Y., Feng, C. et al. Prediction of macrotrabecular-massive hepatocellular carcinoma by using MR-based models and their prognostic implications. Abdom Radiol 49, 447–457 (2024). https://doi.org/10.1007/s00261-023-04121-7
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DOI: https://doi.org/10.1007/s00261-023-04121-7