Dr. Quan-Yang Duh is UCSF's chief of endocrine surgery. He cares for patients with hormone gland tumors, including those of the thyroid, parathyroid and adrenal glands, as well as for patients with gastrointestinal cancers. He has a special interest in treating these disorders with laparoscopic and other minimally invasive procedures. He also supervises medical students, residents and fellows training at the San Francisco Veterans Affairs Medical Center.

Duh has published more than 400 papers and co-edited three textbooks. He serves on the editorial boards of numerous medical journals, including Thyroid, British Journal of Surgery, JAMA (Journal of the American Medical Association) Surgery, Journal of Clinical Endocrinology & Metabolism, Journal of the Endocrine Society and Asian Journal of Surgery. He has served as president of the American Association of Endocrine Surgeons and Pacific Coast Surgical Association, and he was the first vice president of the American College of Surgeons.

Duh earned his bachelor's degree in molecular biophysics and biochemistry at Yale University. He earned his medical degree at UCSF, where he also completed a residency in surgery and a fellowship in endocrine surgery.