FOLR2 and neoplasm: We have previously reported the existence of transcriptional overlaps between the variety of macrophage subsets that make up Tumor-Associated Macrophages (TAM) and M-CSF dependent macrophages, as both are enriched in the expression of the 170-gene “anti-inflammatory gene set” [19,29], which includes the FRβ-encoding FOLR2 gene [45].