CSF2 and breast cancer: Given our finding that upregulation of GM-CSF in RaptorECKO tumors increased the proportion of CD103+ DCs and IFN-γ+CD8+ T cells, we next examined if GM-CSF has an impact on antitumor immunity in clinical lung (n = 1129) and breast cancer (n = 1218) data sets curated by The Cancer Genome Atlas (TCGA).