Breast Cancer IHC4

**Semantic type:** Intellectual Product

**Definition:** A prognostic score for breast cancer that combines the information from classical immunohistochemistry (IHC) markers: estrogen receptor (ER), progesterone receptor (PR), HER2, and Ki67 to quantitatively assess the prognosis in patients with estrogen receptor positive (ER+) early breast cancer.

**Synonyms:** - Breast Cancer IHC4 Score - IHC4 Score