Abstract
Purpose
The purpose of this study is to determine the impact of pre-operative MRI on surgical management of screening digital breast tomosynthesis (DBT)-detected invasive lobular carcinoma (ILC).
Methods
A retrospective medical record analysis was conducted of women with screening DBT-detected ILC and subsequent surgery from 2017–2021. Clinical, imaging, and pathological features were compared between women who did and did not undergo MRI, and between women with and without additional disease detected on MRI, using the Pearson’s chi-squared test and Wilcoxon signed-rank test. Concordance between imaging and surgical pathology sizes was also evaluated.
Results
Of 125 women (mean age 67 years, range 44–90) with screening-detected ILC, MRI was obtained in 62 women (49.6%) with a mean age of 63 years (range 45–80). Compared to women without MRI, women who had MRI examinations were younger, more likely to have dense breast tissue, and more likely to undergo mastectomy initially rather than lumpectomy (p < 0.001–0.01). Eighteen biopsies were performed based on MRI findings, of which 55.6% (10/18) were malignant. Conventional imaging more frequently underestimated ILC span at the biopsy site than MRI, using a 25% threshold difference (17.5% [7/40] versus 58.5% [24/41], p < 0.001). MRI detected more extensive disease at the biopsy site in six patients (9.7%, 6/62), additional ipsilateral disease in six patients (9.7%, 6/62), and contralateral disease in one patient (1.6%, 1/62). MRI therefore impacted surgical management in 21.0% (13/62) of patients.
Conclusion
MRI led to the detection of additional disease, thus impacting surgical management, in one-fifth of patients with ILC.
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Data availability
The datasets generated during and/or analyzed during the study are not publicly available due to possible compromise of individual privacy; however, the datasets are available from the corresponding author on reasonable request.
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Dr. Bahl and Dr. Deng contributed to the study conception, design, and material preparation. Dr. Bahl performed the data collection and analysis. The first draft of the manuscript was written by Dr. Bahl, and both Dr. Bahl and Dr. Deng read and approved the final manuscript.
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Financial interests: Dr. Bahl is a consultant for Hologic and an expert panelist for 2nd.MD. She previously served as a consultant for Lunit. These relationships are not directly relevant to the submitted work. Dr. Deng has no financial interests. Non-financial interests: The authors have no relevant non-financial interest to disclosure.
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This retrospective study was approved by the Massachusetts General Hospital Institutional Review Board and compliant with the Health Insurance Portability and Accountability Act.
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Presentations: Poster Presentation at the National Consortium of Breast Centers 32nd Annual Interdisciplinary Breast Center Conference in March 2023.
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Bahl, M., Deng, B. Impact of pre-operative MRI on surgical management of screening digital breast tomosynthesis-detected invasive lobular carcinoma. Breast Cancer Res Treat 204, 397–405 (2024). https://doi.org/10.1007/s10549-023-07175-9
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DOI: https://doi.org/10.1007/s10549-023-07175-9