Joyce Ann O'Shaughnessy, M.D.

Joyce Ann O'Shaughnessy, M.D., is a breast cancer researcher and practitioner with Texas Oncology Group in Dallas. She is also the Associate Director for Clinical Research, Director, Chemoprevention Research, and Co-Director, Breast Cancer Research, for US Oncology, the world's largest health care network dedicated exclusively to cancer treatment and research. Its physician practices and cancer centers provide comprehensive outpatient care for over half a million patients each year.

Dr. O'Shaughnessy graduated from Yale University Medical School and completed her internship and internal medicine residency at Massachusetts General Hospital. She then did a fellowship in medical oncology at the National Cancer Institute, serving as special assistant to the NCI director from 1988 to 1990 and coordinating the development of new cancer drug approval guidelines for the NCI and the Food and Drug Administration. She was a Senior Investigator in the Medical Breast Cancer Section of the NCI from 1990 through 1995, conducting many breast cancer treatment clinical trials. She has also served as principal investigator on several tissue-based breast cancer prevention clinical trials involving the administration of fenretinide, tamoxifen, and other SERMs to women who have a high risk of developing breast cancer.

"I'm so pleased to be involved with breastcancer.org because I believe that patient education is key to preventing and curing breast cancer," Dr. O'Shaughnessy says. "The more women know, the more proactive they will become."