HAVCR1 and neoplasm: Immunohistochemical staining of the serial sections and fluorescent double staining analysis indicated that Tim‐1 and IL‐10 were coexpressed in tumor B cells (Fig. 1A, b, c), and a moderate correlation was observed between their positivities (Cramer's V = 0.55, P < 0.001) (Fig. 1B).