Evolving Strategies for the Treatment of Chronic Lymphocytic Leukemia in the Upfront Setting

Abstract

Chronic lymphocytic leukemia (CLL) is a disease of marked clinical heterogeneity, and while some patients have a normal life expectancy, others develop rapidly progressive disease shortly after diagnosis. The current standard for upfront treatment of CLL is chemoimmunotherapy for younger fit patients, FCR (fludarabine, cyclophosphamide, and rituximab) being the prototype. For older patients, BR (bendamustine and rituximab) exhibits excellent activity with decreased toxicity. For the frailest patients, CD20 monoclonal antibodies with or without chlorambucil have proven to be efficacious. The novel oral kinase inhibitors ibrutinib and idelalisib are FDA-approved in the relapsed/refractory setting, and ibrutinib is approved upfront for those with del(17p). These drugs have produced long-term durable responses in the relapsed/refractory setting, and studies are underway using these as single agent upfront or in combination with both chemotherapy and monoclonal antibodies. Here, we review standard upfront therapies and new agents and combinations that are on the horizon for CLL.

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