Figure 4. Correlation between RAI2 expression and tumor immune microenvironment in STAD samples. (A–C) Associations between the expression levels of RAI2 and immune score (A), stromal score (B) and ESTIMATE score (C). (D–L) Correlation between surface markers of immune cells and RAI2 expression. (D, E) B cell, (F) CD4+ T cell, (G–I) M2 macrophage, (J–L) dendritic cell.