CD79A and neoplasm: Elevated tumor-infiltrating B cell levels compared to circulating were primarily due to an enrichment in class-switched IgA and IgG B cells (IgA: effect size = 0.21, P = 6.2 × 10−270; IgG: effect size = 0.046, P = 4.1 × 10−14; Extended Data Fig. 6a).