Abstract
Background
We aimed at investigating outcome of systemic treatments in advanced breast PT.
Methods
All cases of advanced breast PT treated with systemic treatments from 1999 to 2019, in one of the referral sarcoma centers involved in the study, were retrospectively reviewed.
Results
56 female patients were identified. Median age was 52 (range of 25–76) years. Patients received a median number of 2 systemic treatments (range of 1–4). Best responses according to RECIST were 1 (3.7%) CR, 11 (40.7%) PR, 6 (22.2%) SD, 9 (33.3%) PD with anthracyclines plus ifosfamide (AI); 2 (16.7%) PR, 4 (33.3%) SD, 6 (50.0%) PD with anthracycline alone; 3 (18.8%) PR, 4 (25.0%) SD, 9 (56.3%) PD with high-dose ifosfamide given as a continuous infusion (HD-IFX); 3 (20.0%) SD, 12 (80.0%) PD with a gemcitabine-based regimen (with 2 patients not evaluable); 1 (8.3%) PR, 2 (16.7%) SD, 9 (75.0%) PD with trabectedin (with 1 patient not evaluable); 1 (16.7%) PR, 1 (16.7%) SD, 4 (66.7%) PD with tyrosine-kinase inhibitors (TKI). The median PFS were 5.7 (IQR 2.5–9.1) months with AI; 3.2 (IQR 2.2–5.0) months with anthracycline alone; 3.4 (IQR 1.4–6.7) months with HD-IFX; 2.1 (IQR 1.4–5.2) months with gemcitabine-based chemotherapy; 1.8 (IQR 0.7–6.6) months with trabectedin; 3.4 (IQR 3.1–3.8) months with TKI. With a median follow-up of 35.3 (IQR 17.6–66.9) months, OS from the start of first-line systemic treatment was 15.2 (IQR 7.6–39.6) months.
Conclusion
In this series of advanced PT (to our knowledge, the largest reported so far), AI was associated with a high rate of responses, however, with a median PFS of 5.7 months. Other systemic treatments were poorly active.
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Data availability
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- PT:
-
Breast phyllodes tumor
- HD-IFX:
-
High-dose ifosfamide
- TKI:
-
Tyrosine-kinase inhibitors
- CTCAE:
-
Cancer Institute Common Toxicity Criteria
- RECIST:
-
Response Evaluation Criteria in Solid Tumors
- ORR:
-
Overall response rate
- PFS:
-
Progression-free survival
- OS:
-
Overall survival
- AI:
-
Anthracycline plus ifosfamide
- CR:
-
Complete response
- PR:
-
Partial response
- SD:
-
Stable disease
- PD:
-
Progressive disease
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Acknowledgements
The authors are thankful to our patients who participated in this research to allow us to study a rare disease.
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Conceptualization, EP and PGC; methodology, EP, PGC, LM; software, SLV; validation, EP and PGC; formal analysis, SLV, and LM; investigation, all.; resources, all.; data curation, EP, and SLV; writing original draft preparation, EP, and PGC; writing review and editing, all.; visualization, FB, and EP; supervision, PGC All authors have read and agreed to the published version of the manuscript.
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The following represents disclosure information provided by authors of this manuscript. All relationships are considered compensated unless otherwise noted. Relationships are self-held unless noted. EP and SP reports institutional financial interest in Advenchen, Amgen-Dompe, Bayer, Epizyme, Eli Lilly, Daiichi-Sankyo, GlaxoSmithKline, Karyopharm, Novartis, Pfizer, PharmaMar, and SpringWorks Therapeutics. OM reports Advisory Board for Bayer, Blueprint Medicines, MSD, Pfizer, Invited Speaker for BMS, Eli-Lilly, Roche, Servier and Institutional, Financial interest as Local PI for Bayer, Blueprint Medicines, Eli-Lilly, Epizyme. AS reports advisory role for Pharmamar and also travel and congress assistance, research, teaching from Pharmamar, teaching, travel and congress assistance from Lilly, Eisai and travel and congress assistance from Merc, Amgen, Sanofi. CV reports Advisory Board for Bayer, Boehringer Ingelheim, GSK, Lilly, Mundipharma, Phar-maMar; Invited Speaker from Roche; Institutional, Financial interest as Local PI from Adap-timmune, Karyopharm, Lilly. GGB reports Honoraria from Eli Lilly, Eisai, PharmaMar and MSD; travel grants from PharmaMar, Pfizer and Eli Lilly; advisory board from Eli Lilly and Glaxo Smith Kline. AB reports Consultancy/Advisory board for Eli Lilly, Eisai, Glaxo Smith Kline; Speakers' fees from PharmaMar; Travel grants from PharmaMar. JMB reports payment or honoraria for lectures, presentations, speakers bureaus, manuscript writing or educational events from PharmaMar, Lilly, Bayer, Eisai, Daichii; grants or contracts from Pharmamar, Novartis, Eisai, IMMIX Biopharma; payment for expert testimony from Phar-maMar, Lilly, Bayer, Eisai, Daichii; participation on a Data Safety Monitoring Board or Advisory Board for Roche, Lilly, PharmaMar; Leadership or fiduciary role in board, society, committee or advocacy group for Daiichi Sankyo, Karyopharm, Celgene, Pfizer, BMS, Blueprint, Deciphera, Nektar, Forma, Amgen, Lixte, GEIS, CTOS, ESMO, SELNET. PGC reports honoraria and consultancy or advisory fees from Bayer, Deciphera, Eisai, Eli Lilly, and Pfizer outside the submitted work and institutional financial interest in Advenchen Labora-tories, Amgen Dompe, AROG Pharmaceuticals, Bayer, Blueprint Medicines, Daiichi-Sankyo, De-ciphera, Eisai, Eli Lilly, Epizyme, GlaxoSmithKline, Karyopharm, Novartis, Pfizer, and Pharma-Mar. Other authors: no competing interests to declare.
Ethical approval
The study was conducted according to the guidelines of the Declaration of Helsinki, and approved by the Ethics Committee of Fondazione IRCCS Istituto Nazionale Tumori di Milano (protocol code 255/20, date 05/11/2020).
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Informed consent was obtained from all subjects involved in the study.
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Palassini, E., Mir, O., Grignani, G. et al. Systemic treatment in advanced phyllodes tumor of the breast: a multi-institutional European retrospective case-series analyses. Breast Cancer Res Treat 192, 603–610 (2022). https://doi.org/10.1007/s10549-022-06524-4
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DOI: https://doi.org/10.1007/s10549-022-06524-4