(ES-truh-jin rih-SEP-ter test) A lab test to find out if cancer cells have estrogen receptors (proteins to which estrogen will bind). If the cells have estrogen receptors, they may need estrogen to grow, and this may affect how the cancer is treated.
A lab test to determine if breast cancer cells have estrogen receptors. If the cells have estrogen receptors, they may depend on estrogen for growth. This information may influence how the breast cancer is treated.
A test done during the biopsy of cancerous tissue to determine if its growth depends on estrogen.
test done on tumor tissue to determine if a tumor is sensitive to estrogen (ER positive), and thus whether hormone therapy may be effective.
A test to determine a tumor's sensitivity to hormones. If a test is negative, hormone treatments will be of no avail.
A test that determines whether the breast cancer in a particular patient is stimulated by estrogen to grow.
Lab test used to determine if breast cancer relies on estrogen for growth.