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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 | Table of Contents | Next Article 
CLINICAL TRIALS AND OBSERVATIONS
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 Jäger,
Manuela Bergmann,
Stephan Stilgenbauer,
Carmen Schweighofer,
Clemens M. Wendtner,
Hartmut Döhner,
Günter Brittinger,
Bertold Emmerich,
Michael Hallek, the German CLL Study Group
From the Department of Internal Medicine I, University of Cologne, Cologne, Germany; Institute of Medical Statistics and Epidemiology, Technical University, Munich, Germany; Hanusch Hospital, Vienna, Austria; Ernst-von-Bergmann Hospital, Potsdam, Germany; Department of Internal Medicine V, University of Heidelberg, Heidelberg, Germany; Hospital Barmherzige Brüder, Regensburg, Germany; Internistische Gemeinschaftspraxis Prof Hirschmann/Dr Siehl/Dr Soling, Clinic for Internal Medicine, Kassel, Germany; Medical University of Vienna, Department of Internal Medicine I, Vienna, Austria; Department of Internal Medicine III, Ludwig-Maximilians-University of Munich, Munich, Germany; Department of Internal Medicine III, University of Ulm, Ulm, Germany; Department of Hematology, University of Duisburg-Essen, Essen, Germany; and Department of Internal Medicine Innenstadt, Ludwig-Maximilians-University of Munich, Munich, Germany.
Combination chemotherapy with fludarabine plus cyclophosphamide (FC) was compared with 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 younger than 66 years who predominantly had advanced CLL were randomly assigned 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 for 3 days intravenously, repeated every 28 days). Both regimens were administered to a maximum of 6 courses. FC combination chemotherapy resulted in significantly higher complete remission rate (24%) and overall response rate (94%) compared with fludarabine alone (7% and 83%; P < .001 and P = .001). FC treatment also resulted in longer median progression-free survival (48 vs 20 months; P = .001) and longer treatment-free survival (37 vs 25 months; P < .001). Thus far, no difference in median overall survival has been 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 younger patients with advanced CLL.

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