Orhan Abdi was a surgeon who lived between 1877 and 1948. After graduation from the Military School of Medicine, he went to Germany to specialize in surgery. After completion of his specialization he submitted his thesis, which was related to spinal surgery. He was Professor of Orthopedics and Professor of Surgery in the Second Department of Surgery in Darulfunun School of Medicine between 1909 and 1933. He wrote a book on surgery entitled “Surgical Operation”. In this article, the biography and thesis of Orhan Abdi are reviewed.
Keywords: History of medicine, Orhan Abdi, spine surgery.