In line with recent scRNAseq studies describing murine tumour-infiltrating myeloid cells populations32–34, we identified three monocytic populations, namely, non-classical monocytes (Cluster 6; Nr4a1, Ifitm6), tumour-infiltrating monocytes (Cluster 2; Ly6c2, Vcan), and transitionary mono-mac (Cluster 3; Adgre1, Folr2). The gene discussed is FOLR2; the disease is neoplasm.