Abstract
Objective
To construct and test a nomogram based on intra- and peritumoral radiomics and clinical factors for predicting malignant BiRADS 4 lesions on contrast-enhanced spectral mammography.
Methods
A total of 884 patients with BiRADS 4 lesions were enrolled from two centers. For each lesion, five ROIs were defined using the intratumoral region (ITR), peritumoral regions (PTRs) of 5 and 10 mm around the tumor, and ITR plus PTRs of 5 mm and 10 mm. Five radiomics signatures were established by LASSO after selecting features. A nomogram was built using selected signatures and clinical factors by multivariable logistic regression analysis. The performance of the nomogram was assessed with the AUC, decision curve analysis, and calibration curves, and also compared with the radiomics model, clinical model, and radiologists.
Results
The nomogram built by three radiomics signatures (constructed from ITR, 5 mm PTR, and ITR + 10 mm PTR) and two clinical factors (age and BiRADS category) showed powerful predictive ability in internal and external test sets with AUCs of 0.907 and 0.904, respectively. The calibration curves, decision curve analysis, showed favorable predictive performance of the nomogram. In addition, radiologists improved the diagnostic performance with the help of nomogram.
Conclusion
The nomogram established via intratumoral and peritumoral radiomics features and clinical risk factors had the best performance in distinguishing benign and malignant BiRADS 4 lesions, which could help radiologists improve diagnostic capabilities.
Key Points
• Radiomics features from peritumoral regions in contrast-enhanced spectral mammography images may provide valuable information for the diagnosis of benign and malignant breast imaging reporting and data system category 4 breast lesions.
• The nomogram incorporated intra- and peritumoral radiomics features and clinical variables have good application prospects in assisting clinical decision-makers.





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- AUC:
-
Area under the ROC curve
- BiRADS:
-
Breast Imaging Reporting and Data System
- CC:
-
Craniocaudal
- CESM:
-
Contrast-enhanced spectral mammography
- DCA:
-
Decision curve analysis
- ITR:
-
Intratumoral region
- LASSO:
-
Least absolute shrinkage and selection operator
- LE:
-
Low energy
- MLO:
-
Mediolateral oblique
- MRI:
-
Magnetic resonance imaging
- PTR:
-
Peritumoral region
- RC:
-
Recombined
- ROC:
-
Receiver operating characteristic
- ROI:
-
Region of interest
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Acknowledgements
We thank all the study participants and referring technicians for their participation in this study, especially thanks Haicheng Zhang and Ran Zhang for providing technical support to the study.
Funding
This study has received funding by the National Natural Science Foundation of China (82001775), the Natural Science Foundation of Shandong Province (ZR2021MH120), and the Special Fund for Breast Disease Research of Shandong Medical Association (YXH2021ZX055).
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The scientific guarantor of this publication is Haizhu Xie.
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One of the authors of this manuscript (Ran Zhang) is Huiying Medical Technology Co. Ltd. The remaining authors declare no relationships with any companies whose products or services may be related to the subject matter of the article.
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Two of the authors (Haicheng Zhang and Ran Zhang) have significant statistical expertise.
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• multicenter study
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Shijie Zhang and Huafei Shao are co-first authors.
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Zhang, S., Shao, H., Li, W. et al. Intra- and peritumoral radiomics for predicting malignant BiRADS category 4 breast lesions on contrast-enhanced spectral mammography: a multicenter study. Eur Radiol 33, 5411–5422 (2023). https://doi.org/10.1007/s00330-023-09513-3
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DOI: https://doi.org/10.1007/s00330-023-09513-3