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Dr. Orlo H. Clark is Professor of Surgery at UCSF and specializes in endocrine surgery, thyroid cancer and other endocrine malignancies. He is certified by the by the American Board of Surgery. Dr. Clark specializes in Endocrine Surgical conditions; specifically treatment of disorders of the thyroid and parathyroid, as well as, adrenal and endocrine pancreas. He utilizes minimally invasive surgical techniques and open operations with intraoperative parathyroid hormone assay and intraoperative magnification.
Dr. Clark attended Cornell University and Cornell Medical School. He completed his surgical training and residency at UCSF. He also did a year Fellowship at the Royal Postgraduate Medical Center in London in Endocrine Surgery, and joined the UCSF faculty in 1973. He continues to teach medical students, residents, and fellows and has received the Lim Thomas Award and Excellence in Teaching Award distinguishing his outstanding teaching accomplishments at UCSF. He is also recognized as one of the best surgeons in America by several publications, such as Leading Health Professionals of the World and America's Top Doctors.
Dr. Clark was the previous Chief of Surgery at Mt. Zion Medical Center and the Vice Chair of the Department of Surgery. Dr. Clark is recognized as a leader in his field both nationally and internationally. He has been the President of the American Association of Endocrine Surgeons, the American Thyroid Association, the International Association of Endocrine Surgeons, and is currently President Elect of the Pacific Coast Surgical Association. He is an honorary member of the German Surgical Society, the Turkish Endocrine Surgical Society, the Asian Endocrine Surgical Society, and received a Docteur Honoris Causa (Honorary Doctorate) from Poitier University. Dr. Clark has authored and co-authored over 300 journal manuscripts, chapters, and books. Highly respected by his peers, Dr. Clark was named to the list of U.S. News "America's Top Doctors," a distinction reserved for the top 1% of physicians in the nation for a given specialty.
Besides a busy and successful clinical practice, Dr. Clark is actively involved in research focusing on what makes thyroid and parathyroid cancers grow and spread to other areas of the body. He also investigates the genetic basis of familial thyroid cancer. Dr. Clark is currently a principle investigator and co-investigator on several clinical trials concerning improving the care of patients with thyroid cancer.
In its most recent survey, U.S. News in collaboration with Castle Connolly Medical Ltd. listed twenty-five (25) surgeons in the UCSF Department of Surgery, nearly one-third (1/3) of the clinical faculty, on the list of U.S. News "Top Doctors". The list, compiled from the opinion of colleagues, denotes the top 10% of physicians within a region practicing a given specialty. Fifteen of the 25 department surgeons were also named by their peers to the list of America's Top Doctors (ATD), a distinction reserved for the top 1% of physicians in the nation for that specialty. The listings are published online at U.S. News. The group rankings are intended to guide patients in selecting a doctor and physicians in making specialty referrals.
Orlo H. Clark, M.D., former Chief of Surgery at UCSF Mount Zion, and his surgical colleagues Quan-Yang Duh, M.D., Wen T. Shen, M.D., and Jessica Gosnell, M.D. are leading efforts to identify molecular markers in biopsy tissue as the number of thyroid cases continue rise in the U.S.