Meaning of ER+ in English

ER+

Estrogen receptor positive. Breast cancer cells that have a protein (receptor molecule) to which estrogen will attach. Breast cancer cells that are ER+ need the hormone estrogen to grow and will usually respond to hormone (antiestrogen) therapy that blocks these receptor sites.

NCI English Dictionary of Cancer Terms.      Английский словарь раковых терминов NCI(Национальный институт злокачественных новообразований).