ERBB2 and breast cancer: In this work, it was observed that the molecular subtypes, regardless of the degree or clinical stage, the relationship with the L/M index, the CEA and CA 15-3 antigens in women with breast cancer presented recurrence and maintained high levels of antigens from the start, although the luminal subtypes showed greater survival due to the greater number of therapeutic alternatives, but not so for the cases of HER2 and NT.