Triple Negative Breast Cancer is a type of cancer that has no receptor for progesterone, estrogen or HER2. The special property gives it resistance to many chemotherapeutic agents which target these receptors, thus it has the worst prognosis and fast development.

Because of its high resistance to treatment and aggressive nature, the survival rates of triple negative breast cancer for 5 years and more are low. Based on a study among 50.000 women in 2007, it was found out that survival rates of triple negative breast cancer for 5 years was 77%, as compared with 93% in other types of breast cancer.