Estrogen (ER) and progesterone (PR) receptors (immunohistochemical study)
The immunohistochemical (IHC) study of estrogen (ER) and progesterone (PR) receptors is a method used to determine the expression of hormonal receptors in tumor cells.
The presence of ER and PR receptors indicates hormone dependence of the tumor, which is of key importance for disease prognosis and the selection of hormonal therapy, especially in breast cancer.