CEACAM5 and breast cancer: Even though many studies have been conducted worldwide, only a few single biomarkers are useful in managing mammary cancer over time.38 Serum tumor markers for estradiol (ER), progesterone (PR), and carcinoembryonic antigen (CEA) were found to be higher in the DMBA group.39 The DMBA group showed a substantial increase in the selected mammary cancer indicators, indicating detrimental changes in mammary gland function.