|Test||ESTROGEN RECEPTOR, IMMUNOHISTOCHEMISTRY STAIN|
|Description||The presence of estrogen receptor (ER) in breast cancer has been shown to be a predictor of prognosis and response to endocrine therapy. The presence of nuclear staining for ER is considered a sign of good prognosis. Breast cancers with ER/PR positivity have demonstrated a better response to hormone therapy than those with only ER positivity.
NOTE: This test is usually ordered in conjunction with a pathology consultation. The pathology professional component will be billed separately by the consulting pathologist.
|Specimen||Formalin-fixed or paraffin-embedded tissue specimen.|
|Reference Values||An interpretive report will be issued.|
|Analytic Time||2 Days|
|Day(s) Test Set Up||Monday through Friday|