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Irinotecan combined with docetaxel in pre-treated metastatic breast cancer patients: a phase II study
G P Stathopoulos1, D Tsavdaridis, N A Malamos
1First Oncology Department, Errikos Dunant Hospital, Semitelou 2A, Athens, Greece. dr-gps@ath.forthnet.gr
Purpose:
This is a phase II study where a novel chemotherapy combination was tested in pre-treated breast cancer patients: docetaxel and irinotecan have already been established as agents for breast and colorectal cancer, respectively.
Methods:
Forty-eight (median age 54 years, range 26-77 year) patients, all evaluable, were enrolled. All patients had been pre-treated with anthracycline-combined chemotherapy, 30 of whom were also treated with paclitaxel and 2 with docetaxel. World Health Organization (WHO) performance status was 0-2. The dominant metastasis was in the liver (54.17%), in the lungs (27.08%), in soft tissues (12.50%) and in the skeleton (6.25%). Treatment involved irinotecan infusion 200 mg/m(2) for 90 min and docetaxel infusion 80 mg/m(2) for 90 min, repeated once every 3 weeks.
Results:
Twenty-five (52.08%, 95% confidence interval [CI] 37.95-66.21) patients showed responses: 3 complete (6.25%, 95% CI 0-13.05) and 22 (45.83%, 95% CI 31.74-59.92) partial; the most responsive metastases were observed at the liver site (53.85%). Grade 3 and 4 neutropenia was observed in 18 patients (37.50%); 14 (29.17%) patients developed anaemia and three (6.25%), thrombocytopenia. Concerning non-haematologic toxicity, alopecia and fatigue were common; grade 3 diarrhea was observed in only one (2.08%) patient.
Conclusion:
The irinotecan-docetaxel combination produces quite a high response rate in pre-treated advanced breast cancer patients.
