Pre‐chemotherapy white blood cell depletion by therapeutic leukocytapheresis in leukemia patients: A single‐institution experience

Abstract

Background Hyperleukocytosis is commonly seen in acute and chronic leukemias. Therapeutic leukocytapheresis using an automatic cell separator can help to achieve prompt leukoreduction to reduce the rate of thrombotic events and early mortality as well as to prevent tumor lysis syndrome. Aim In this study, we report a single center's experience in managing leukemia patients with therapeutic leukocytapheresis prior to chemotherapy. Materials and Methods Leukocytapheresis procedures were performed in 192 leukemia patients (including acute myeloid leukemia [AML], acute lymphoblastic leukemia [ALL], and chronic myeloid leukemia [CML]) with hyperleukocytosis between January and December 2016. Results Median % reduction of white blood cell (WBC) count was 30.5% and median % removal efficiency was 46.7% for 75 procedures where the waste bag was sampled. WBC removal efficiency strongly depended on diagnosis (and was 71%, 66%, and 39% for ALL, AML, and CML, respectively). Procedures were generally well tolerated with only 9 out of 192 patients having mild adverse effects. Discussion and Conclusion In the absence of specific guidelines for the management of hyperleukocytosis, leukocytapheresis in association with chemotherapy should be considered early in clinical practice.