BACKGROUND: Response to the first two cycles of preoperative chemotherapy might differentiate subgroups of breast cancer patients with high or minimal chances for a pathologic complete response (pCR) and may be used as an in vivo chemosensitivity test. METHODS:Breast cancer patients were treated with two cycles of TAC (docetaxel 75 mg/m(2), doxorubicin 50 mg/m(2), cyclophosphamide 500 mg/m(2) every 21 days). Patients whose tumors showed a response received four more cycles. Patients whose tumors did not respond were randomized to four additional cycles TAC or NX (vinorelbine 25 mg/m(2) days 1 and 8, capecitabine 2000 mg/m(2) days 1-14, every 21 days). The primary end point was pCR at surgery. RESULTS: Two hundred and eighty-five patients showed a clinical response, in 73.0% after two cycles, in 88.4% at surgery, and a pCR was seen in 17.9%. Breast conservation was possible in 72.2%. Responding patients obtained a pCR in 22.6% whereas non-responding patients reached a pCR in 7.3% and 3.1% with TAC or NX, respectively. Grade III/IV neutropenia and febrile neutropenia were observed during TAC in 70.2% and 13.5%, respectively. Significantly less toxicity were observed with NX. CONCLUSION: Early response to TAC can reliably identify patients with a high chance of achieving a pCR. New effective treatments need to be explored for patients without an early response.
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BACKGROUND: Response to the first two cycles of preoperative chemotherapy might differentiate subgroups of breast cancerpatients with high or minimal chances for a pathologic complete response (pCR) and may be used as an in vivo chemosensitivity test. METHODS:Breast cancerpatients were treated with two cycles of TAC (docetaxel 75 mg/m(2), doxorubicin 50 mg/m(2), cyclophosphamide 500 mg/m(2) every 21 days). Patients whose tumors showed a response received four more cycles. Patients whose tumors did not respond were randomized to four additional cycles TAC or NX (vinorelbine 25 mg/m(2) days 1 and 8, capecitabine 2000 mg/m(2) days 1-14, every 21 days). The primary end point was pCR at surgery. RESULTS: Two hundred and eighty-five patients showed a clinical response, in 73.0% after two cycles, in 88.4% at surgery, and a pCR was seen in 17.9%. Breast conservation was possible in 72.2%. Responding patients obtained a pCR in 22.6% whereas non-responding patients reached a pCR in 7.3% and 3.1% with TAC or NX, respectively. Grade III/IV neutropenia and febrile neutropenia were observed during TAC in 70.2% and 13.5%, respectively. Significantly less toxicity were observed with NX. CONCLUSION: Early response to TAC can reliably identify patients with a high chance of achieving a pCR. New effective treatments need to be explored for patients without an early response.
Authors: Xinrong Guo; Sibylle Loibl; Michael Untch; Volker Möbus; Kathrin Schwedler; Peter A Fasching; Jana Barinoff; Frank Holms; Christoph Thomssen; Dirk M Zahm; Rolf Kreienberg; Maik Hauschild; Holger Eidtmann; Sascha Tauchert; Keyur Mehta; Gunter von Minckwitz Journal: Breast Care (Basel) Date: 2011-08-19 Impact factor: 2.860
Authors: Taher A Al-Tweigeri; Dahish S Ajarim; Adher A Alsayed; Mohamed M Rahal; Mohamed O Alshabanah; Asma M Tulbah; Osama A Al-Malik; Doha M Fatani; Gamal A El-Husseiny; Naser B Elkum; Adnan A Ezzat Journal: Med Oncol Date: 2009-06-13 Impact factor: 3.064
Authors: J Hilton; J Weberpals; I Lorimer; S Amin; S Islam; L Pelletier; M Daneshmand; J Hanson; M Nabavi; D Parolin; R Mallick; S Verma Journal: Oncol Lett Date: 2012-04-26 Impact factor: 2.967