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  • Title: Preemptive Approach to Plerixafor Use Is Optimal in Patients With Relapsed/Refractory Germ Cell Tumors Undergoing Peripheral Blood Hematopoietic Stem Cell Collection: Effect on Collection Days, Yields, and Cost.
    Author: Sohutskay DO, Tetrick AM, Goebel WS, Schwering D, Reddy MS.
    Journal: J Clin Apher; 2024 Oct; 39(5):e22145. PubMed ID: 39291715.
    Abstract:
    Evidence describing the use of plerixafor in the off-label population of relapsed/refractory germ cell tumors (GCT) is limited. We aim to describe the effect of rescue versus preemptive plerixafor use on apheresis collection days, collection yields, and cost. We retrospectively collected data on 77 consecutive patients (at least 15 years of age) with GCT who underwent peripheral blood stem cell (PBSC) collection for autologous stem cell transplant between January 1, 2020 and May 1, 2022. Depending on insurance approval, plerixafor was given either as "rescue" (after a first apheresis collection of < 5 × 106 CD34+ cells/kg) or as "preemptive" on Day 4 of granulocyte-colony stimulating factor (G-CSF) prior to the first apheresis collection, if the Day 4 peripheral blood CD34+ count was < 40 cells/μL. A total of 66% of patients who received preemptive plerixafor completed collection in 1 day, similar to good mobilizers who only needed G-CSF (71%, p = 0.366). In contrast, all poor mobilizers in the rescue group required at least 2 days of collection and had lower CD34+ cell yields than the preemptive group (7.15 vs. 9.81 × 106/kg, p = 0.0055). A cost analysis revealed that preemptive plerixafor may save approximately $7000 per patient compared with a rescue approach. Preemptive plerixafor in GCT patients undergoing PBSC collection allows relatively poor mobilizers to collect in fewer days and with lower overall cost. Fewer apheresis procedures result in less risk to the patient, increased patient satisfaction, and the ability to schedule more patients within the constraints of staffing.
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