Abstract
Objectives
Accurate preoperative estimation of the risk of breast-conserving surgery (BCS) resection margin positivity would be beneficial to surgical planning. In this multicenter validation study, we developed an MRI-based radiomic model to predict the surgical margin status.
Methods
We retrospectively collected preoperative breast MRI of patients undergoing BCS from three hospitals (SYMH, n = 296; SYSUCC, n = 131; TSPH, n = 143). Radiomic-based model for risk prediction of the margin positivity was trained on the SYMH patients (7:3 ratio split for the training and testing cohorts), and externally validated in the SYSUCC and TSPH cohorts. The model was able to stratify patients into different subgroups with varied risk of margin positivity. Moreover, we used the immune-radiomic models and epithelial-mesenchymal transition (EMT) signature to infer the distribution patterns of immune cells and tumor cell EMT status under different marginal status.
Results
The AUCs of the radiomic-based model were 0.78 (0.66–0.90), 0.88 (0.79–0.96), and 0.76 (0.68–0.84) in the testing cohort and two external validation cohorts, respectively. The actual margin positivity rates ranged between 0–10% and 27.3–87.2% in low-risk and high-risk subgroups, respectively. Positive surgical margin was associated with higher levels of EMT and B cell infiltration in the tumor area, as well as the enrichment of B cells, immature dendritic cells, and neutrophil infiltration in the peritumoral area.
Conclusions
This MRI-based predictive model can be used as a reliable tool to predict the risk of margin positivity of BCS. Tumor immune-microenvironment alteration was associated with surgical margin status.
Clinical relevance statement
This study can assist the pre-operative planning of BCS. Further research on the tumor immune microenvironment of different resection margin states is expected to develop new margin evaluation indicators and decipher the internal mechanism.
Key Points
• The MRI-based radiomic prediction model (CSS model) incorporating features extracted from multiple sequences and segments could estimate the margin positivity risk of breast-conserving surgery.
• The radiomic score of the CSS model allows risk stratification of patients undergoing breast-conserving surgery, which could assist in surgical planning.
• With the help of MRI-based radiomics to estimate the components of the immune microenvironment, for the first time, it is found that the margin status of breast-conserving surgery is associated with the infiltration of immune cells in the microenvironment and the EMT status of breast tumor cells.
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Abbreviations
- BCS:
-
Breast-conserving surgery
- CRC:
-
Colorectal cancer
- CSS model:
-
Comb_Seg_Seq model
- DCIS:
-
Ductal carcinoma in situ
- DEGs:
-
Differentially expressed genes
- EMT:
-
Epithelial-mesenchymal transition
- ER:
-
Estrogen receptor
- EIC:
-
Extensive intraductal component
- FSA:
-
Frozen-section analysis
- HER-2:
-
Human epidermal growth factor receptor 2
- HR:
-
Hormone receptor
- iDCs:
-
Immature dendritic cells
- NPV:
-
Negative predictive value
- PR:
-
Progesterone receptor
- RC model:
-
Radiomics-Clinicopathological Model
- RFE:
-
Recursive feature elimination
- TB:
-
Tumor budding
- TCGA:
-
The Cancer Genome Atlas
- TiME:
-
Tumor immune microenvironment
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Acknowledgements
We appreciate the assistance from the Disease Registry Department, the Artificial Intelligence Lab and the Big Data Center of Sun Yat-sen Memorial Hospital, Sun Yat-sen University. We also appreciate the support from REDCap development team and research teams of Vanderbilt University Medical Center.
Funding
This work was supported by grants from the Natural Science Foundation of China (81621004, 92159303, 81720108029, 81930081, 91940305), Guangdong Science and Technology Department (2020B1212060018, 2020B1212030004, 2019A1515110075), Department of Natural Resources of Guangdong Province (GDNRC[2021]51), Clinical Innovation Research Program of Bioland Laboratory (2018GZR0201004), Bureau of Science and Technology of Guangzhou (20212200003, 202102010221), the Program for Guangdong Introducing Innovative and Enterpreneurial Teams (2019BT02Y198), the Yat-sen Scholarship of Young Scientist program of Sun Yat-sen Memorial Hospital, Sun Yat-sen University, and by the grants from the Sun Yat-sen Clinical Research Cultivating Program of Sun Yat-sen Memorial Hospital, Sun Yat-sen University(#SYS-Q-202002), the Sun Yat-Sen University Clinical Research 5010 Program (#2018022), as well as by National Natural Science Foundation of Guangdong Province (#2019A1515011467, #2021A1515012361, #2019A1515110075), grants from the National Institute of Hospital Administration (#RXDBZ-2022-04) and the grants from the China Anti-aging Promoting Association.
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The scientific guarantor of this publication is Erwei Song.
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The study was approved by the IRBs of the three included hospitals, respectively. Among them, the approval number of Sun Yat-sen Memorial Hospital of Sun Yat-sen University (SYMH) IRB is 2020-KY-028, the approval number of Sun Yat-sen University Cancer Center (SYSUCC) IRB is B2020-333-01, and the approval number of Tangshan People’s Hospital (TSPH) IRB is RMYY-LLKS-2020-104.
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Ma, J., Chen, K., Li, S. et al. MRI-based radiomic models to predict surgical margin status and infer tumor immune microenvironment in breast cancer patients with breast-conserving surgery: a multicenter validation study. Eur Radiol 34, 1774–1789 (2024). https://doi.org/10.1007/s00330-023-10144-x
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DOI: https://doi.org/10.1007/s00330-023-10144-x