There was no association between Nav1.5 expression and triple-negative breast cancer (TNBC; P = 0.12; Fisher’s exact test; Table 1), age (P = 0.52; Fisher’s exact test; Table 1), menopause (P = 0.46; Fisher’s exact test; Table 1) or endocrine therapy (P = 0.51; Fisher’s exact test; Table 1). The gene discussed is SCN5A; the disease is triple-negative breast carcinoma.