INSTRUMENTS USED FOR ENDOSCOPIC SURGERY OESOPHAGOSCOPE This instrument is used for examination of the inside of the esophagus. 1- Diagnostic use-Diagnostic use Cancer in the esophagus Cardiospasm Benign stricture of the esophagus-benign stricture of the esophagus Pharyngeal pouch-Pharyngeal pouch 2 – Therapeutic use-therapeutic use To remove the foreign body-to remove the foreign body To remove a benign tumor (Esophagus) Taking a biopsy sample from the esophagus for histopathological examination. How