Jacqueline Jonklaas is an Associate Professor of Endocrinology and Metabolism, as well as a member of the Center for the Study of Sex Differences (CSD) in Health, Aging and Disease and of the Research Faculty at the Lombardi Cancer Center. She specializes in the treatment of thyroid disorders, including hyperthyroidism, thyroid nodules and goiter. She is especially interested in the treatment of thyroid cancer and is a member of a multi-institutional registry that examines the effect of treatment on thyroid cancer outcomes.