Definition of Progesterone receptor test
Progesterone receptor test: A lab test that is used to determine whether breast cancer cells have progesterone receptors. If the cells have progesterone receptors, they may depend on progesterone for growth and usually respond to hormone therapy. Breast cancer cells that do not have progesterone receptors do not need the hormone progesterone to grow and usually do not respond to hormone therapy.
Last Editorial Review: 3/19/2012
Back to MedTerms online medical dictionary A-Z List
Need help identifying pills and medications?
Get the latest health and medical information delivered direct to your inbox FREE!