Estrogen for Breast Cancer (VIDEO) Washington University School of Medicine This video is under embargo. Please login to access this video. Caption A new study at Washington University School of Medicine in St. Louis has shown that estrogen therapy can shrink tumors in some women with metastatic breast cancer. Estrogen works against metastatic tumors that have become resistant to estrogen-lowering drugs, which are widely used for treating advanced breast cancer. Credit Washington University in St. Louis Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.