Estrogen Receptor Positive by Immunohistochemistry Greater than 1 Percent

**Semantic type:** Laboratory or Test Result

**Definition:** An immunohistochemical staining finding indicating that greater than 1 percent of the cells in a tissue sample are expressing estrogen receptor.

**Synonyms:** - ER >1% - Estrogen Receptor Positive Greater than 1 Percent - Estrogen Receptor Positive Greater than 1% - Estrogen Receptor Positive by Immunohistochemistry Greater than 1%