Concomitant use of Tyrosine-Kinase Inhibitor and Mepolizumab in Asthma Secondary to Chronic Myeloid Leukemia with Hypereosinophilia.

Introduction: Asthma and hypereosinophilia have been treated with different therapeutics in the past. Some of them appear to be more effective in symptoms resolution and decreasing eosinophilic count.

Case Presentation: We report here an unusual case of asthma with hypereosinophilia secondary to Chronic Myeloid Leukemia (CML) with high prevalence of eosinophilic infiltrate, treated simultaneously with an anti-IL-5 antibody (Mepolizumab) and Tyrosine-kinase Inhibitors (TKI: Imatinib and Bosutinib) for three years. The patient showed a promising reduction of pulmonary exacerbations and good control of CML without developing side effects.

Conclusion: We hope that this finding could inspire further studies on the efficacy and safety of the concomitant use of anti-IL-5 and TKI.