Susan J. Mandel, MD, MPH, FACP, FACE is Professor of Medicine and Radiology at the Perelman School of Medicine, University of Pennsylvania, and Director of Clinical Endocrinology for the University of Pennsylvania Health System. Dr. Mandel graduated from Harvard University and received her M.D. from Columbia University's College of Physicians and Surgeons. She completed an internal medicine residency at Columbia's New York Presbyterian Hospital and a fellowship in endocrinology at the Brigham and Women's Hospital in Boston. She joined the Brigham faculty in 1992 and moved to the University of Pennsylvania in 1997 to develop a clinical thyroid program and direct the fellowship program, a position she still holds. At the University of Pennsylvania, she has been committed to training the next generation of endocrinologists in clinical skills and clinical research. She has mentored 35 fellows in clinical endocrinology, including performance of thyroid ultrasound and fine-needle aspiration biopsy and she has supervised the research programs for 20 endocrine and radiology fellows. Several of her former fellows now lead thyroid programs at other academic institutions. For these activities, she has been awarded the prestigious Don Martin Teaching Award from the University of Pennsylvania. Dr. Mandel's commitment to fellowship education has also led to a leadership role as the President of the Association of Program Directors in Endocrinology Diabetes and Metabolism (APDEM) from 2009 -2011. Dr. Mandel is also a nationally recognized leader in the education of her peers.  In 1992, more than a decade before acceptance of its routine use, Dr. Mandel initiated the routine use of ultrasound to characterize thyroid nodules and perform ultrasound-guided fine-needle aspiration biopsies of thyroid nodules. She rapidly demonstrated the major advantages of employing diagnostic thyroid ultrasound for all patients with thyroid nodules and dispelled the concept that patients with multiple thyroid nodules were less likely to have thyroid cancer than those with solitary nodules. In 2003, she implemented the Endocrine Society's highly successful and popular "Introductory Hands-On Thyroid Ultrasound Workshop," and subsequently introduced an advanced course with a curriculum targeted at the growing number of endocrinologists who are now performing thyroid ultrasound. Dr. Mandel also directs the American Thyroid Association's Advanced Neck Ultrasound course, and serves on the faculty of the American Association of Clinical Endocrinologists' Neck Sonography course as well as for the neck sonography section of Endocrine University. Through her activities in these professional societies' courses, she has trained more than 2,000 U.S. and international endocrinologists and surgeons. Her expertise and educational skills have been recognized with invitations for presentations not only by the American Association of Clinical Endocrinologists, The Endocrine Society, the American Thyroid Association, and other international Endocrine organizations, but also by professional radiology societies. These include invited lectures at national meetings of the Radiologic Society of North America, the American Institute of Ultrasound in Medicine, and the Society of Nuclear Medicine. She has presented more than 150 regional, national and international lectures.