Abstract
Background
Traditional histopathology performed by pathologists through naked eyes is insufficient for accurate survival prediction of clear cell renal cell carcinoma (ccRCC).
Methods
A total of 483 whole slide images (WSIs) data from three patient cohorts were retrospectively analyzed. We performed machine learning algorithm to identify optimal digital pathological features and constructed machine learning-based pathomics signature (MLPS) for ccRCC patients. Prognostic performance of the prognostic model was also verified in two independent validation cohorts.
Results
MLPS could significantly distinguish ccRCC patients with high survival risk, with hazard ratio of 15.05, 4.49 and 1.65 in three independent cohorts, respectively. Cox regression analysis revealed that the MLPS could act as an independent prognostic factor for ccRCC patients. Integration nomogram based on MLPS, tumour stage system and tumour grade system improved the current survival prediction accuracy for ccRCC patients, with area under curve value of 89.5%, 90.0%, 88.5% and 85.9% for 1-, 3-, 5- and 10-year disease-free survival prediction.
Discussion
The machine learning-based pathomics signature could act as a novel prognostic marker for patients with ccRCC. Nevertheless, prospective studies with multicentric patient cohorts are still needed for further verifications.
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Data availability
Data supporting the findings of this study are available within the supplementary information and are also available from the authors upon reasonable request.
Code availability
The code used for slide image process and feature extraction had been made publicly available at https://qupath.github.io/ [17].
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Acknowledgements
We appreciate the QuPath digital pathology software for its contribution. Open data used in this publication were generated by the National Cancer Institute Clinical Proteomic Tumor Analysis Consortium (CPTAC) and TCGA database.
Funding
This work was supported by the National Natural Science Foundation of China (81972393 and 82002665). The funding sources had no role in the design of the study; collection, analysis or interpretation of the data; writing of the report; the decision to submit for publication.
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Contributions
NZ, XW, JZ and SC participated in the study conception and design, data collection, data analysis, reviewed the paper and approved the final draft for submission. LJ, FG, EZ and TW participated in data collection, reviewed the paper and approved the final draft for submission.
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Ethics approval and consent to participate
The ethical approval of this study has been approved from the Research Ethics Committee of Shanghai General Hospital (approval number: 2021SQ121). Not further ethical approval was required since all the slice images from the CPTAC cohort and the TCGA cohort were publicly available for research purposes.
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Not applicable.
Competing interests
The authors declare no competing interests.
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Chen, S., Jiang, L., Gao, F. et al. Machine learning-based pathomics signature could act as a novel prognostic marker for patients with clear cell renal cell carcinoma. Br J Cancer 126, 771–777 (2022). https://doi.org/10.1038/s41416-021-01640-2
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DOI: https://doi.org/10.1038/s41416-021-01640-2
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