Using cBioPortal, it was found that PRKDC (DNA‐PK encoding gene) tended to coexist with the functional markers of MDSCs which include NOS2 (iNOS‐encoding gene), Arg1 (Arg1‐encoding gene), and IDO1 (IDO‐encoding gene) in 19 breast cancer studies involving 9134 patients/9555 samples. This evidence concerns the gene NOS2 and breast cancer.