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Randomized Phase III Trial Of Pegylated Liposomal Doxorubicin Versus Vinorelbine Or Mitomycin C Plus Vinblastine In Women With Taxane-Refractory Advanced Breast Cancer

Alan M. Keller, Robert G. Mennel, Vassilis A. Georgoulias, Jean-Marc Nabholtz, Aura Erazo, Anna Lluch, Charles L. Vogel, Manfred Kaufmann, Gunther von Minckwitz, I. Craig Henderson, Lillian Mellars, Leila Alland, Craig Tendler

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Purpose To compare the efficacy of pegylated liposomal doxorubicin (PLD) with that of a common salvage regimen (comparator) in patients with taxane-refractory advanced breast cancer. Patients and Methods Following failure of a first- or second-line taxane-containing regimen for metastatic disease, 301 women were randomly assigned to receive PLD (50 mg/m2 every 28 days); or comparator-vinorelbine (30 mg/m2 weekly) or mitomycin C (10 mg/m2 day 1 and every 28 days) plus vinblastine (5 mg/m2 day 1, day 14, day 28, and day 42) every 6 to 8 weeks. Patients were stratified before random assignment based on number of previous chemotherapy regimens for metastatic disease and presence of bone metastases only. Results Progression-free survival (PFS) and overall survival (OS) were similar for PLD and comparator (PFS: hazard ratio [HR], 1.26; 95% CI, 0.98 to 1.62; P = .11; median, 2.9 months [PLD] and 2.5 months [comparator]; OS: HR, 1.05; 95% CI, 0.82 to 1.33; P = .71; median, 11.0 months [PLD] and 9.0 months [comparator]). In anthracycline-naïve patients, PFS was somewhat longer with PLD, relative to the comparator (n = 44; median PFS, 5.8 v 2.1 months; HR, 2.40; 95% CI, 1.16 to 4.95; P = .01). Most frequently reported adverse events were nausea (23% to 31%), vomiting (17% to 20%), and fatigue (9% to 20%) and were similar among treatment groups. PLD-treated patients experienced more palmar-plantar erythrodysesthesia (37%; 18% grade 3, 1 patient grade 4) and stomatitis (22%; 5% grades 3/4). Neuropathy (11%), constipation (16%), and neutropenia (14%) were more common with vinorelbine. Alopecia was low in both the PLD and vinorelbine groups (3% and 5%). Conclusion PLD has efficacy comparable to that of common salvage regimens in patients with taxane-refractory metastatic breast cancer, thereby representing a useful therapeutic option.