Tumor-associated myeloid populations were identified including one tumor-associated S100a9 positive neutrophil population (TAN); six macrophage (TAM)/monocyte populations expressing Csf1r, CD64 (Fcgr1) and CD11b (Itgam); one cDC1 population expressing Batf3 and Clec9a; one cDC2 population marked by Cd209a expression, a migratory DC subset expressing Ccr7 and Ly75 and a Siglech positive pDC population (Figures 1C, D). Here, S100A9 is linked to neoplasm.