Table 1.

Recommended images of landmarks in upper GI endoscopy

Recommendations	Esophagus	Stomach	Duodenum
ESGE [1] (2001)	Proximal esophagus (taken 20 cm from the incisor) Z-line (taken 2 cm above)	Cardia and fundus on retroflexed view Body (taken from the upper part of the lesser curvature) Angulus on partial retroflexion Antrum	Duodenal bulb 2nd part of the duodenum (taken near the ampulla)
WCOG 2013 Working Party Report [5] (2014)	Z-line and gastroesophageal junction	Cardia and fundus on retroflexed view Body Angulus Antrum	Distal extend of examination in the duodenum
ASGE/ACG/AGA [6, 7] (2015)	Not defined*	Not defined*	Not defined*
Tang et al. [9] (2015)	Esophageal introitus Proximal, middle, and distal esophagus Gastroesophageal junction	Cardia and fundus on retroflexed view Body on either forward and retroflexed view Angulus on retroflexed view Antrum and pyloris	Duodenal bulb 2nd or 3rd portion of the duodenum Ampulla (optional)
ESGE [4] (2016)	Proximal esophagus Distal esophagus Z-line and diaphragm indentation	Cardia and fundus on retroflexed view Body on either forward (including lesser curvature) or retroflexed view (including greater curvature) Angulus on partial retroflexion Antrum	Duodenal bulb 2nd part of the duodenum, including the ampulla

^*Photodocumentation of important anatomic landmarks is recommended, but these are not specified.