Furthermore, immune-related eRNAs of SLIT2, CLEC3B, LBPL1, FRY, RASGEF1B, DST, and ITIH5 as prognostic signatures for bone metastasis of breast cancer were confirmed by Least Absolute Shrinkage and Selection Operator (LASSO), multivariate Cox regression, and Cell-type Identification by Estimating Relative Subsets of RNA Transcripts (CIBERSORT) analysis. The gene discussed is SLIT2; the disease is breast cancer.