J Cancer 2014; 5(5):320-327. doi:10.7150/jca.8748 This issue

Research Paper

Eribulin Mesylate in Pretreated Breast Cancer Patients: A Multicenter Retrospective Observational Study

Teresa Gamucci1*, Andrea Michelotti2*, Laura Pizzuti3, Lucia Mentuccia1, Elisabetta Landucci2, Isabella Sperduti4, Luigi Di Lauro3, Alessandra Fabi5, Giuseppe Tonini6, Valentina Sini7, Nello Salesi8, Ilaria Ferrarini2, Angela Vaccaro1, Ida Pavese9, Enzo Veltri8, Luca Moscetti10, Paolo Marchetti7, Patrizia Vici3✉

1. Medical Oncology Unit ASL Frosinone, Frosinone, Italy;
2. Oncology Unit I, Azienda Ospedaliera Universitaria Pisana, Pisa, Italy;
3. Division of Medical Oncology B, Regina Elena National Cancer Institute, Rome, Italy;
4. Biostatistics Unit, Regina Elena National Cancer Institute, Rome, Italy;
5. Division of Medical Oncology A, Regina Elena National Cancer Institute, Rome, Italy;
6. Department of Medical Oncology, University Campus Bio-Medico, Rome, Italy;
7. Oncology Unit, Sant'Andrea Hospital, Sapienza University of Rome, Rome, Italy;
8. Medical Oncology, S.M. Goretti Hospital, Latina, Italy;
9. Medical Oncology, San Pietro Hospital, Rome, Italy;
10. Division of Medical Oncology, Department of Oncology, Belcolle Hospital, ASL Viterbo, Viterbo, Italy.
* These two authors contributed equally to this work and serve as first co-authors.

This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY-NC) License. See http://ivyspring.com/terms for full terms and conditions.
Gamucci T, Michelotti A, Pizzuti L, Mentuccia L, Landucci E, Sperduti I, Di Lauro L, Fabi A, Tonini G, Sini V, Salesi N, Ferrarini I, Vaccaro A, Pavese I, Veltri E, Moscetti L, Marchetti P, Vici P. Eribulin Mesylate in Pretreated Breast Cancer Patients: A Multicenter Retrospective Observational Study. J Cancer 2014; 5(5):320-327. doi:10.7150/jca.8748. Available from https://www.jcancer.org/v05p0320.htm

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Background: Eribulin was recently approved in patients progressing after being treated with anthracyclines and taxanes and after two or more chemotherapy lines for advanced disease.

Objectives: This multicenter observational retrospective study was performed in order to evaluate activity and tolerability of eribulin in real-world patient population.

Methods: 133 advanced breast cancer patients pretreated with ≥ 2 chemotherapy lines for metastatic disease were retrospectively enrolled in the observational trial in 11 italian cancer centres.

Results: A median of 5 cycles of eribulin (range, 1-15) were administered. Twenty-eight partial responses were observed, for an overall response rate of 21.1% (95%CI,14.1-28.0). A stable disease was recorded in 57 patients (42.8%), and a clinical benefit (response or stable disease lasting ≥ six months) was observed in 51 patients (38.3%, 95%CI, 30.1-46.6). The subgroup analysis showed that a significant improvement in term of partial response and clinical benefit was achieved when eribulin was administered in HER-2 negative tumors (p=0.01 and p=0.004, respectively) and when it is given as third-line (p=0.09 and p=0.02, respectively). Toxicity was manageable; fatigue is the most common side effect observed, usually of low-grade, and clearly cumulative-dose related.

Conclusions: In this retrospective, observational analysis eribulin confirmed its efficacy and manageable tolerability even in real-world population and in heavily pretreated patients.

Keywords: advanced breast cancer, eribulin mesylate, real-world population, heavily pretreated patients, chemotherapy.