MAL2 and breast cancer: Our 13-gene (ADAM9, MAL2, CLEC3A, TNFRSF14, RELB, SEMA3B, IGFALS, CEBPD, KRTCAP3, CCL19, CHAD, KRT5, and LTF) signature based on DEGs of mitophagy-related tumor classification was conducted for BC.