Paclitaxel-containing High-dose Chemotherapy in High-risk Breast Cancer Patients

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Abstract
Despite standard-dose adjuvant chemotherapy, the prognosis for patients with breast cancer and extensive axillary lymph node involvement at diagnosis is poor. The efficacy of a paclitaxel-containing, high-dose chemotherapy protocol in 21 high-risk breast cancer patients is assessed. After standard-dose chemotherapy followed by peripheral blood stem cell (PBSC) mobilization, high-dose therapy with paclitaxel, carboplatin, and cyclophosphamide and CD34-selected PBSC rescue was given. Hematologic reconstitution after high-dose therapy was rapid. Main toxicity included diarrhea grade I or II in about half of the patients and infections were observed in 19%. Five-year probabilities for relapse and failure-free survival were 32% and 62%, respectively. High-dose consolidation with paclitaxel, carboplatin, and cyclophosphamide achieves a high failure-free survival in patients with high-risk breast cancer with acceptable toxicities and stable, long-term hematopoietic reconstitution. Evaluation of the benefit of high-dose therapy in these patients in larger prospective, randomized trials is warranted and currently under way.

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