Kyoto classification of gastritis, virtual chromoendoscopy and artificial intelligence: Where are we going? What do we need?

Table 2 The Kyoto classification score

Endoscopic finding	Score
Mucosal atrophy	0	None	C0-CI according to Kimura Takemoto classification
	1	Mild	CII-CIII
	2	Severe	OI-OIII
Intestinal metaplasia	0	None	None
	1	Mild	Within the antrum
	2	Severe	Up to the corpus
Enlarged folds	0	Negative	< 5 mm gastric fold width
	1	Positive	≥ 5 mm gastric fold width
Nodularity	0	Negative	None
	1	Positive	Small nodules in the antrum
Diffuse redness	0	None	None
	1	Mild	Mild translucency of collecting venules in the body
	2	Severe	Severe translucency of collecting venules in the body

A score of 0 indicates no Helicobacter pylori (H. pylori) infection, a score of ≥ 2 indicates current H. pylori infection, and a score of ≥ 4 indicates higher risk of gastric cancer risk.