Prince Faisal bin Khalid bin Abdulaziz, Deputy Governor of Assir Region, opened here tonight the First International Conference on New Developments in the Field of Diagnosis and Treatment of Digestive System's Tumors, organized by the Saudi German Hospital in Assir in cooperation with Assir Health authorities. Upon arrival at the venue, Prince Khalid was briefed on the contents of the medical exhibition held on the sidelines of the conference.