Hannah Choe, MD discusses the role of the CSF-1 receptor (CSF-1R) pathway in the pathogenesis of graft-versus-host disease (GVHD) and other diseases. She reviews the rationale for targeting this pathway as a therapeutic strategy and examines preclinical and clinical data on the use of CSF-1R inhibitors, such as axatilimab, for the treatment of GVHD. Dr. Choe provides insights on the practical considerations for integrating these novel agents into clinical practice.