<prompt> All of the following are poor prognostic markers of CA Breast exceptPCNA PositivityER positivityHer 2 neu positivityp53 over expression  <response>: Answer- B. ER positivityPatients with hormone receptor positive tumor show good response to hormone therapy.Tumors positive for estrogen or progesterone receptors have a higher response rate to endocrine therapy than tumors that do not express estrogen or progesterone receptors.Tumors positive for one receptor and not the other have an intermediate response rate. 