Is ER positive breast cancer curable? ER-positive breast cancer has a high chance of being successfully treated, especially when it’s discovered early. A diagnosis at a later stage will have a less positive outlook, but being diagnosed at a later stage is less common. There are still many treatment options for late stage cancer.
What is considered ER positive breast cancer? Guidelines for the use of chemotherapy and endocrine therapy recently recommended that estrogen receptor (ER) status be considered positive if ≥1% of tumor cells demonstrate positive nuclear staining by immunohistochemistry. In clinical practice, a range of thresholds are used; a common one is 10% positivity.
Is it better to have ER positive or negative breast cancer? The survival rate for breast cancers are excellent if the cancer is detected early, and in general HR positive cancers grow slower and have a better prognosis. Overall, breast cancers that are both HR positive and HER2 negative have the best outcomes.
What are ER PR and HER2? ER = estrogen receptor, Her2 = human epidermal growth factor receptor 2, PR = progesterone receptor.