Introduction of endoscopic submucosal dissection in the West

Table 4 Endoscopic submucosal dissection for early gastric cancer

Histology	Depth
	Mucosal cancer				Submucosal cancer
	No ulceration		Ulcerated		SM1	SM2
	≤ 20	> 20	≤ 30	> 30	≤ 30	Any size
Intestinal	1	3	3	4	3	4
Diffuse	2	4	4	4	4	4

¹Guideline criteria for ESD;

²Consider surgery;

³Expanded criteria for ESD;

⁴Surgery (gastrectomy + lymph node dissection). ESD: Endoscopic submucosal dissection.