We ranked the DEGs by calculating BC values and showed the top 10 genes, followed by univariate and multifactorial analyses, which showed that GRIA2, NTRK1, SCN9A, SLC18A2, CNR1, PIK3R1, and DGKB were associated with good prognosis, and CNR1 was the most closely associated with prognosis among them. This evidence concerns the gene SCN9A and breast cancer.