Joyce Ann O'Shaughnessy, MD is a breast cancer researcher and practitioner in Texas Oncology, P.A. She is Associate Director for clinical research for US Oncology and is Director, Chemoprevention Research and Co-Director, Breast Cancer Research for US Oncology. O'Shaughnessy's major area of research interest is the development of new chemoprevention strategies for women at high risk for the development of breast cancer and she is involved in several ongoing chemoprevention studies.
O'Shaughnessy graduated summa cum laude from Holy Cross College in 1978 and served on the Holy Cross College Board of Trustees from 1988 to 1996. She graduated cum laude from Yale University Medical School in 1982. O'Shaughnessy served as Special Assistant to the National Cancer Institute director from 1988 to 1990 and coordinated the development of new cancer drug approval guidelines for the National Cancer Institute and Food and Drug Administration. She then served as a Senior Investigator in the Medical Breast Cancer Section of the National Cancer Institute from 1990 through 1995. O'Shaughnessy has also served as principal investigator on several tissue-based breast cancer prevention clinical trials involving the administration of fenretinide, tamoxifen, and other SERM's to women at high risk for the development of breast cancer. O'Shaughnessy has published and spoken widely on new prevention and treatment strategies for breast cancer.