The OS of 4.1B in BC. (A) High mRNA level of 4.1B was not associated with longer OS in all BC patients. (B, C) High mRNA level of 4.1B was not associated with longer OS both in ER-positive or ER-negative BC patients. (D–G) High mRNA level of 4.1B was not associated with longer OS in basal-like, luminal A, luminal B, or HER2+ BC patients. (H, I) High mRNA level of 4.1B was associated with longer OS in TP-mutant, but not in TP-wild subtype BC patients.