[Efficacy and safety of cisplatin plus capecitabine for patients with metastatic triple negative breast cancer progressing after anthracycline and taxane treatment].

Objective: To evaluate the efficacy and safety of cisplatin and capecitabine combination (XP) therapy for patients with metastatic triple negative breast cancer (TNBC) progressing after anthracycline and taxane treatment.
Methods: Twenty-nine metastatic TNBC patients were prospectively enrolled to receive capecitabine (1, 000 mg/m(2) twice daily on days 1-14) and cisplatin (75 mg/m(2) on day 1) , repeated every 3 weeks.
Results: With a median of 6 cycles of XP, all 29 patients were evaluable for response, including 18 PR (62.1%), 6 SD (20.7%), 5 PD (17.2%) and no CR. The response rate was 62.1%. Patients with earlier stage at diagnosis (stage I to IIIA), longer post-operative disease free survival (>2 years) and less metastatic sites (≤ 3) obtained significantly higher response rate than patients with later stage at diagnosis (stage IIIB to IV), shorter post-operative disease free survival (≤ 2 years) and more metastatic sites (>3). The leading side effects were grade 1/2 gastrointestinal and hematological toxicities. Grade 3/4 toxicities included neutropenia (34.5%), leukocytopenia (31.0%), anemia (6.9%), thrombocytopenia (3.4%), nausea/vomiting (20.7%), stomatitis (3.4%), and hand-foot syndrome (3.4%).
Conclusion: Cisplatin and capecitabine combination therapy is an active and well-tolerated doublet treatment in metastatic TNBC patients progressing after anthracycline and taxane treatments.