To assess whether treatments with EIPA/Cis (on 4T1 cells) or ESO (on TSA cells) affect their expression on cancer cells and M2 infiltrating macrophages, tumors sections from untreated or treated mice were co‐stained with CD206 and anti‐NHE‐1 or v‐ATPase Abs. This evidence concerns the gene MRC1 and cancer.