In CD11b+ MDSC infiltrating 4T1 breast tumors (group 3, Figure 1C), HIF1A, EGR1, NF-kappaB1 and c-jun are the transcription factors with the highest z-scores (HIF1A, EGR1, NF-kappaB1, c-jun, Figure 1C). Here, EGR1 is linked to breast neoplasm.