The groups also marginally differed with respect to the isotype of MM, specifically, the MDS/AML cohort included IgG 67%, IgA 33%, and free light chain (FLC) – only 0% compared to 57%, 19%, and 22% in the non‐SPM group, respectively (P = 0.100). The gene discussed is CD79A; the disease is myelodysplastic syndrome.