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Aspirin use is associated with improvement in distant metastases outcome in patients with residual disease after neoadjuvant chemotherapy

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Abstract

Purpose

Aspirin (ASA) use has been correlated with improved outcomes in high-risk patients at risk for distant metastases. Breast cancer (BC) patients with residual disease, particularly nodal disease (ypN +) after neoadjuvant chemotherapy (NAC), are high-risk patients portending worse outcomes. We hypothesized that ASA use can reduce distant metastases and improve outcomes in these patients.

Methods

Patients at our institutions from 2005 to 2018, with BC who did not achieve complete response (pCR) after NAC were reviewed (IRB protocol STU- 052012–019). Data, including evidence of ASA use, and clinico-pathologic parameters were analyzed. Survival outcomes were obtained (Kaplan Meier analysis) and univariate (UVA) and multivariable (MVA) Cox proportional hazards regression analyses were performed.

Results

637 did not achieve pCR (ypN+ = 422). 138 were ASA users. Median follow-up for the control and ASA group were 3.8 (IQR 2.2–6.3) and 3.8 (IQR 2.5–6.4) years, respectively. Majority were stage II/III. 387 were hormone receptor positive, 191 HER2 +, and 157 triple negative. On UVA, ASA use, PR status, pathologic and clinical stage showed significance for DMFS, and disease-free survival (DFS). On MVA, ASA use associated with improved 5-year DFS (p = .01, 87.0% vs 79.6%, adjusted HR = 0.48) and improved 5-year DMFS (p = .04, 92.8% vs 89.2%, adjusted HR = 0.57). In the ypN + patients, ASA use associated with improved 5-year DMFS (p = .008, 85.7% vs 70.7%, adjusted HR = 0.43) and DFS (p = .02, 86.8% vs 74.3%, adjusted HR = 0.48).

Conclusion

For non-responders, particularly ypN + patients, ASA use associated with improved outcome. These hypotheses-generating results suggest for development of prospective clinical trials of augmented ASA use in selected very high-risk BC patients.

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Fig. 1
Fig. 2

Data availability

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

Abbreviations

ASA:

Aspirin

BC:

Breast cancer

pCR:

Pathologic complete response

ypN + :

Residual nodal disease

NAC:

Neoadjuvant chemotherapy

OS:

Overall survival

DFS:

Disease-free survival

DMFS:

Distant metastasis free survival

UVA:

Univariate analysis

MVA:

Multivariable analysis

HR + :

Hormone receptor positive

IQR:

Interquartile range

ER/PR:

Estrogen receptor/Progesterone receptor

LVI:

Lymphovascular invasion

pT:

Pathologic tumor stage

pN:

Pathologic nodal stage

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Acknowledgements

We wish to thank the University of Texas Southwestern Department of Radiation Oncology for providing support in this research endeavor.

Funding

None to declare.

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Authors

Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Christopher Johns, MKC, Y-LL, and DWNK. The first draft of the manuscript was written by CJ and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to D. W. Nathan Kim.

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Conflict of interest

The authors have no relevant financial interests to disclose. Non-financial interests: Dr. Unni has served on advisory boards for Pfizer, Eli Lilly, Novartis, Macrogenics, Biotheranostics, and Eisai.

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Johns, C., Montalvo, S.K., Cauble, M. et al. Aspirin use is associated with improvement in distant metastases outcome in patients with residual disease after neoadjuvant chemotherapy. Breast Cancer Res Treat 199, 381–387 (2023). https://doi.org/10.1007/s10549-023-06920-4

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