Abstract
Objectives
We aimed to develop and validate a deep convolutional neural network (DCNN) model for preoperative prediction of microvascular invasion (MVI) in hepatocellular carcinoma (HCC) and its clinical outcomes using contrast-enhanced computed tomography (CECT) in a large population of candidates for surgery.
Methods
This retrospective study included 1116 patients with HCC who had undergone preoperative CECT and curative hepatectomy. Radiological (R), DCNN, and combined nomograms were constructed in a training cohort (n = 892) respectively based on clinicoradiological factors, DCNN probabilities, and all factors; the performance of each model was confirmed in a validation cohort (n = 244). Accuracy and the AUC to predict MVI were calculated. Disease-free survival (DFS) and overall survival (OS) after surgery were recorded.
Results
The proportion of MVI-positive patients was respectively 38.8% (346/892) and 35.7 % (87/244) in the training and validation cohorts. The AUCs of the R, DCNN, and combined nomograms were respectively 0.809, 0.929, and 0.940 in the training cohorts and 0.837, 0.865, and 0.897 in the validation cohort. The combined nomogram outperformed the R nomogram in the training (p < 0.001) and validation (p = 0.009) cohorts. There was a significant difference in DFS and OS between the R, DCNN, and combined nomogram-predicted groups with and without MVI (p < 0.001).
Conclusions
The combined nomogram based on preoperative CECT performs well for preoperative prediction of MVI and outcome.
Key Points
• A combined nomogram based on clinical information, preoperative CECT, and DCNN can predict MVI and clinical outcomes of patients with HCC.
• DCNN provides added diagnostic ability to predict MVI.
• The AUCs of the combined nomogram are 0.940 and 0.897 in the training and validation cohorts, respectively.
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Abbreviations
- DCNN:
-
Deep convolutional neural network
- DFS:
-
Disease-free survival
- EPAP:
-
Enhancement pattern in the arterial phase
- IDI:
-
Integrated discrimination improvement
- MVI:
-
Microvascular invasion
- NRI:
-
Net reclassification improvement
- OS:
-
Overall survival
- R:
-
Radiological
- RVI:
-
Radiogenomic venous invasion
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Acknowledgements
We thank Dr. Peihua Cao in Zhujiang Hospital, Southern Medical University, for his help in statistics.
Funding
This work was funded by Guangdong Basic and Applied Basic Research Foundation (2019A1515011269, 2021A1515011305), Clinical Research Startup Program of Southern Medical University by High-Level University Construction Funding of Guangdong Provincial Department of Education (LC2016PY034), and Opening Research Fund of Guangzhou Key Laboratory of Molecular and Functional Imaging for Clinical Translation (201905010003).
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The scientific guarantor of this publication is Xianyue Quan.
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The authors have declared that no competing interest exists.
Statistics and biometry
Two of the authors (Xinming Li and Xianyue Quan) have significant statistical expertise. We thank Dr. Peihua Cao of Zhujiang Hospital, Southern Medical University, for his help in statistics.
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• retrospective
• diagnostic or prognostic study
• multicenter study
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Li, X., Qi, Z., Du, H. et al. Deep convolutional neural network for preoperative prediction of microvascular invasion and clinical outcomes in patients with HCCs. Eur Radiol 32, 771–782 (2022). https://doi.org/10.1007/s00330-021-08198-w
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DOI: https://doi.org/10.1007/s00330-021-08198-w