CRABP2 and cancer: We then conducted DEGs analysis and K‐M survival analysis based on these genes and ultimately screened out three potential biomarkers (CRABP2, ERBB2, and GLO1) of LN metastasis in breast cancer by applying the following filter criteria: upregulated in tumor samples, risky factor for survival, upregulated in cancer cells (Figure 5E–H; Figure S6B,C, Supporting Information).