Early gastric cancer: A challenge in Western countries

Table 2 Criteria for endoscopic mucosal resection, endoscopic submucosal dissection and surgery

	Mucosal cancer				Submucosal cancer
	No ulcer		Ulcer present		SM1	SM2
Size	≤ 20	> 20	≤ 30	> 30	≤ 30	Any size
Differentiated	Y	G	G	R	G	R
Undifferentiated	Gray	R	R	R	R	R

Y: Yellow is guideline criteria for endoscopic mucosal resection; G: Green is guideline criteria for endoscopic submucosal dissection; R: Red is surgery; Gray: Expanded indication for endoscopic submucosal dissection; SM1: Submucosal invasion < 500 µm; SM2: Submucosal invasion ≥ 500 µm.