Prince Sattam bin Abdulaziz, Acting Governor of Riyadh, launched here today the activities of the international conference on colon and rectum surgery. Thirty professors and lecturers from the United States and a number of European countries and Australia are participating in the five-day conference organized by King Faisal Specialist Hospital and Research Center in Riyadh in cooperation with King Saud University. The conference will highlight the latest medicine developments in the field of treatment of the diseases of the colon and rectum.