Clusters 9 (Camk1d + Neutrophils) and 13 (Ly6g + neutrophils) show a close correlation with leukemia progression (Fig. 2F) with a progressive increase (> 10-fold) of Ly6g + neutrophils by Day 14 in BBC2 engrafted mice compared with naive mice (5.25% versus 0.47% respectively). This evidence concerns the gene CAMK1D and leukemia.