PSMA7 and inherited bone marrow failure syndrome: The discovery of OSM deficiency as an underlying cause of IBMFS by Garrigue, Kermasson, and colleagues demonstrates that genetic causes of IBMFS extend beyond HSPC intrinsic defects, as alterations of the BMM can also result in IBMFS, and highlights inflammatory cytokines as playing a pathogenic role in the development of IBMFS.