LYN encodes a tyrosine protein kinase of the Src family which is abundantly expressed in immune cells and involved in the occurrence and progression of tumors, including breast cancer, lung cancer, colorectal cancer and chronic leukemia (Wu et al., 2008; Elsberger et al., 2010; Su et al., 2012; Ahluwalia et al., 2021). Here, LYN is linked to breast cancer.