Subsets of RP105-negative plasmablasts in IgG4-related disease

We read with interest the paper by Wallace ZS, plasmablasts as a biomarker for IgG4-related disease (IgG4-RD), independent of serum IgG4 concentrations.1 Evidently, the study showed that patients with active, untreated IgG4-RD have elevations in their circulating plasmablast counts. We strongly approve their results and propose new insights into plasmablast subsets in …