Content for id "Main" Goes Here

Immunohistochemistry - Progesterone Receptor (PR)

  • Introduction to PR

 PR or Progesterone receptor, is one of the most widely used antibodies in Immunohistochemistry.

Picture 1 – PR positivity


This antibody is mainly used along with ER and Her2 to assist in determination of whether a breast case will respond to treatment based on the levels of positivity. This stains up the nuceli of breast epithelial cells and some carcinomas that are PR+. It labels epithelial cells of breast, ovary and endometrium.