indications for gastroscopy may be diagnostic ( to elucidate the nature of definite or indefinite radiological abnormalities , in persistent x-ray negative dyspepsia , post gastric surgery symptoms and upper gastrointestinal bleeding ) or therapeutic ( including polypectomy , electrocoagulation of bleeding points , papillotomy and removal of retained stones and the use of a laser beam to control bleeding ) .
C0017195
gastroscopy
C0038351
gastric