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Abstract
7 regimens of pentostatin based chemoimmunotherapy (CIT) for progressive previously untreated CLL primarily with long term follow-up to update both efficacy and toxicity.Prognostic markers including assessment of IGVH and FISH status were done on all. Response rates and 95% binomial confidence intervals were calculated for each regimen and in the combined cohort. Overall survival and treatment-free survival were evaluated using Kaplan-Meier methods.The initial CIT trial was pentostatin (2 mgs/m2), cyclophosphamide (600 mg/m2) and rituximab (PCR) but subsequent P based CIT trials with modifications in subsequent trials. The cohort (n = 288) included 52% with unmutated IGVH status and del17p (4.5%) and del11q (14.9%). Toxicity profiles were primarily hematologic and no patient has developed MDS or AML after a median follow-up of 6.4 years. The overall response rate across all trials was found to be over 90% with a 41% complete response rate. We validated that the CLL IPI model segregates progressive CLL patients into 4 risk groups associated with OS and TFS.The high overall and complete response levels in favorable genetic risk CLL along with favorable toxicity profiles provide rationale for consideration of a PC based strategy for previously untreated progressive CLL.
View details for PubMedID 29460654