Table 1.

Endoscopic submucosal dissection procedures distribution in Centers 1 and 2 and incidence of polypoid nodule scar according to region of the stomach n (%)

ESD procedures	Center 1 (Brazil)	Center 2 (Japan)
Total number of gastric ESD (n)	60	343
ESD in antrum	37 (62%)	158 (46%)
ESD in proximal stomach	23 (36%)	185 (54%)
Total number of PNS cases	8 (13.3%)	6 (1.7%)
Number of PNS in antrum lesions	8 (21.6%)	6 (3.8%)
Number of PNS in proximal stomach	0 (0%)	0 (0%)

ESD: Endoscopic submucosal dissection; PNS: Polypoid nodule scar.