Natural killer (NK) cells are known to be important IFNγ producers (Vivier et al., 2018) and have been shown to undergo a functional conversion toward ILC1 during sarcoma progression (Gao et al., 2017), but no difference was observed in abundance or maturation state of the NK cell compartment in Csf3r−/− tumors (Figures S3G and S3H). Here, CSF3R is linked to sarcoma.