Inclusion criteria
Barrett’s esophagus, neoplasia, LGIN
NEOPLASIA

Patients aged > 18 and < 99 with eradication of neoplastic Barrett’s esophagus following curative endoscopic resection of visible lesions (maximum T1sm1, G1/2, L0 V0 R0 basal) with planned complete Barrett’s esophagus eradication or primary ablation for low-grade intraepithelial neoplasia (LGIN) or macroscopically invisible high-grade intraepithelial neoplasia (HGIN).Barrett’s esophagus length M ≥ 1 cm (Prague classification).Informed consent.