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Blood, 1 February 2006, Vol. 107, No. 3, pp. 885-891.
Prepublished online as a Blood First Edition Paper on October 11, 2005; DOI 10.1182/blood-2005-06-2395.
Previous Article | Next Article 
Submitted June 15, 2005
Accepted September 13, 2005
Fludarabine plus cyclophosphamide versus fludarabine alone in first line therapy of younger patients with chronic lymphocytic leukemia
Barbara F Eichhorst*, Raymonde Busch, Georg Hopfinger, Rita Pasold, Manfred Hensel, Cordelia Steinbrecher, Siegfried Siehl, Ulrich Jaeger, Manuela Bergmann, Stephan Stilgenbauer, Carmen Schweighofer, Clemens M Wendtner, Hartmut Doehner, Guenter Brittinger, Bertold Emmerich, and Michael Hallek
Department of Internal Medicine I, University of Cologne, Cologne, Germany
Institute of Medical Statistics and Epidemiology, Technical University Munich, Munich, Germany
Hanusch Hospital, Vienna, Austria
Ernst-von-Bergmann Hospital, Potsdam, Germany
Department of Internal Medicine V, University of Heidelberg, Heidelberg, Germany
Hospital Barmherzige Brueder, Regensburg, Germany
Clinic for Internal Medicine, Internistische Gemeinschaftspraxis Prof. Hirschmann/Dr. Siehl/Dr. Soling, Kassel, Germany
Department of Internal Medicine I, Medical University of Vienna, Vienna, Austria
Department of Internal Medicine III, Ludwig-Maximilians-University Munich, Munich, Germany
Department of Internal Medicine III, University of Ulm, Ulm, Germany
Department of Hematology, University of Duisburg-Essen, Essen, Germany
Department of Internal Medicine Innenstadt, Ludwig-Maximilians-University Munich, Munich, Germany
* Corresponding author; email: barbara.eichhorst{at}uk-koeln.de.
The combination chemotherapy with fludarabine plus cyclophosphamide (FC) was compared to the standard regimen of fludarabine monotherapy in first line treatment of younger patients with chronic lymphocytic leukemia (CLL). Between 1999 and 2003 a total of 375 patients with predominantly advanced CLL younger than 66 years were randomized to receive either fludarabine (25 mg/m2 for 5 days intravenously, repeated every 28 days) or FC combination therapy (fludarabine 30 mg/m2 plus cyclophosphamide 250 mg/m2 both for 3 days intravenously, repeated every 28 days). Both regimens were administered to a maximum of 6 courses. The FC combination chemotherapy resulted in a significantly higher complete remission rate (24%) and overall response rate (94%) compared to fludarabine alone (7% and 83%; P < .001 and P = .001). The FC treatment also resulted in a longer median progression-free survival (48 versus 20 months; P = .001), and a longer treatment-free survival (37 versus 25 months; P < .001). So far, no difference in the median overall survival could be observed. FC caused significantly more thrombocytopenia and leukocytopenia, but did not increase the number of severe infections. In summary first line treatment with FC increases the response rates and the treatment-free interval in young patients with advanced CLL.

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