Why get tested?
To determine whether a breast cancer tumor is positive for estrogen and/or progesterone receptors, which helps to guide treatment and determine prognosis

When to get tested?
If you have been diagnosed with breast cancer and your doctor wants to determine whether the tumor’s growth is influenced by the hormones estrogen and/or progesterone

Sample required?
A sample of breast cancer tissue obtained during a biopsy or a tumor removed surgically during a lumpectomy or mastectomy