Table 1

Endoscopic classification of the squamocolumnar junction (SCJ)

GroupLocation of SCJAppearance of SCJ
IWithin 2 cm above gastro-oesophageal junctionUnremarkable, (i.e. relatively straight on insufflation of air)
II (eccentric SCJ)As aboveEccentric, irregularly serrated on insufflation of air
II (tongues of Barrett’s oesophagus)As above“Tongue(s)” and/or islands of columnar epithelium extending into the distal oesophagus
II (segments of Barrett’s oesophagus)Shifted >2 cm above gastro-oesophageal junction (i.e. circumferential segment of columnar mucosa)Any, mostly irregular with additional tongues