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Estrogen/Progesterone Receptor Status

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Also known as: Estrogen Receptors; Progesterone Receptors; ER and PR Status; Hormone Receptor Status
Formal name: Estrogen and Progesterone Receptor Status

At a Glance

Why Get Tested?

The hormone receptor test determines if a breast cancer tumor is positive for estrogen and progesterone receptors, helping to guide treatment and determine prognosis

When to Get Tested?

When you have been diagnosed with invasive breast cancer or when your cancer has recurred

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 health practitioner may have you discontinue taking hormones for a time period before your sample is collected.