Observation of the esophagus, pharynx and lingual root by gastrointestinal endoscopy with a percutaneous retrograde approach

Figure 2 Images of retrograde observation. A: Esophagogastric junction, and the entire view is provided in a single visual field; B: Observation of the hypopharyngoesophageal junction from the cervical esophagus. The cervical esophagus is dilated well, providing a good visual field; C: Laryngeal surface of the epiglottis viewed up from the hypopharynx. Epipharynx and nasal cavity are present in the arrow direction; D: Observation of the epipharynx is possible; E, F: Observation of the lingual root is possible.