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  • Title: Chemoimmunotherapy with low-dose fludarabine and cyclophosphamide and high dose rituximab in previously untreated patients with chronic lymphocytic leukemia.
    Author: Foon KA, Boyiadzis M, Land SR, Marks S, Raptis A, Pietragallo L, Meisner D, Laman A, Sulecki M, Butchko A, Schaefer P, Lenzer D, Tarhini A.
    Journal: J Clin Oncol; 2009 Feb 01; 27(4):498-503. PubMed ID: 19075274.
    Abstract:
    PURPOSE: Chemoimmunotherapy combining fludarabine, cyclophosphamide, and rituximab (FCR) is an active regimen for untreated patients with chronic lymphocytic leukemia (CLL) with 70% complete responses (CRs) and 95% overall responses (ORs). However, grade 3/4 neutropenia was reported in 52% of cycles of treatment. The purpose of this trial was to maintain the high responses but reduce the toxicity of FCR by decreasing the fludarabine and cyclophosphamide (FCR-Lite). PATIENTS AND METHODS: We conducted a single arm study of FCR-Lite which includes maintenance rituximab in 50 untreated CLL patients. Patients were evaluated for response using both the 1996 National Cancer Institute Working Group (NCIWG) guidelines and the 2008 guidelines. Two thirds of patients were treated by community physicians. RESULTS: The median age was 58 years (range, 36 to 85 years); 20 patients had Rai stage 1, 22 had Rai stage 2, and eight had Rai stage 3 and 4. The OR and CR rates were 100% and 79%, respectively, using the 1996 NCIWG guidelines and 100% and 77% using the 2008 guidelines. Median duration of complete response was 22.3 months (range, 5.2 to 42.5 months) and none of the complete responders have relapsed. Grade 3/4 neutropenia was noted in 13% of the cycles of therapy. CONCLUSION: FCR-Lite is highly effective in previously untreated CLL patients. Grade 3/4 neutropenia was dramatically reduced compared to standard FCR and our data demonstrated FCR-Lite can be safely administered in the community setting.
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