Cancer Staging and Life ExpectancyYour prognosis depends on the stage at which your cancer was discovered. Cancer is staged numerically. Each number reflects a number of different characteristics of your breast cancer. These include the size of the tumor, the differentiation of the cells, and whether cancer has moved into lymph nodes or surrounding tissues. Importantly, the cancer subtype doesn’t play a role in staging, only in treatment decisions.Overall survival statistics of women with the major subtypes of breast cancer — such as ER+, HER2+, and triple negative — are combined together. However, with treatment, the vast majority of women with very early stage breast cancers can expect to live a normal lifespan. Survival rates are based on how many people are still alive years after they were first diagnosed. Five-year survival rates are commonly reported, as are ten-year survival rates.According to the American Cancer Society, five-year survival rates are:• stage 0: 100 percent• stage 1: 100 percent• stage 2: 93 percent• stage 3: 72 percent• stage 4 (the metastatic stage): 22 percentOne thing to note is that these statistics also included women with the more aggressive HER2+ subtypes as well as triple negative cancers. Additionally, it takes five years to get to a five-year statistical survival rate, so newer therapies are not included in these numbers. It is likely that an ER+ woman diagnosed with breast cancer today may actually have a significantly higher overall survival.
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