CD79A and neoplasm: For example, leukocyte transendothelial migration, hematopoietic cell lineage, cytokine‐cytokine receptor interaction, intestinal immune network for IgA production, and chemokine signaling pathway were upregulated in high‐CCI tumor tissues but not in low‐CCI tumor tissues in BLCA, CESC, STAD, and LUSC.