To evaluate the expression of arginase in different cellular compartments in lung tumors, we sorted tumor associated macrophages (CD11c+ CD11b- CD103-) and tumor associated neutrophils (CD11b+, LY6G+) from the tumors of a classical mouse model for lung adenocarcinoma-(KRASG12D GEMM) and isolated RNA. This evidence concerns the gene ITGAM and neoplasm.