Hormone Receptor Status
Also known as: Estrogen receptors; Progesterone receptors; ER and PR status
Formal name: Estrogen and Progesterone receptor status
At a Glance
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?
When 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
Test Preparation Needed?
Your doctor may have you discontinue taking hormones for a time period before your sample is collected.
