Murine TANs have been shown to exhibit both anti‐tumour (N1) and pro‐tumour (N2) phenotypes, with TGF‐β driving a pro‐tumour phenotype [86]; however, the relationship between anti‐tumour TANs and the aforementioned polymorphonuclear‐myeloid derived suppressor cells (PMN‐MDSCs) remain incompletely understood. Here, TGFB1 is linked to neoplasm.