Estrogen Receptor Negative

**Semantic type:** Laboratory or Test Result

**Definition:** The absence of detectable estrogen receptor alpha in a tissue sample.

**Synonyms:** - ER Alpha Negative - ER Negative - ER- - ER- - ER-Alpha Negative - ERA Negative - ESR Negative - ESR1 Negative - ESRA Negative - ESTRR Negative - Estrogen Receptor 1 Negative - Estrogen Receptor Alpha Negative - NR3A1 Negative - Negative - Negative Estrogen Receptor - Nuclear Receptor Subfamily 3 Group A Member 1 Negative - estrogen receptor negative