Description of the location, OLGIM stage and management of all cases with HGD/gastric cancer
| Case | Age at diagnosis | Sex | Family history (FDR) | Helicobacter pylori at baseline | Visible lesion at baseline | Location | OLGA baseline | OLGIM baseline | OLGIM Tx | Follow-up time (months) | Treatment | Histological type | Histology surrounding mucosa |
| 1 | 53 | Female | Yes | No | No | NA | I | I | III | 11 | Total gastrectomy | Diffuse | Gastritis |
| 2 | 65 | Male | Yes | Yes | Yes, IM | Angulus+cardia | 0 | IV | III | 80 | Total gastrectomy | Intestinal | Severe IM |
| 3 | 71 | Male | No | No | No | Angulus | 0 | IV | II | 43 | ESD | Intestinal | Moderate IM |
| 4 | 73 | Male | No | Yes | Yes, IM | Antrum | 0 | II | IV | 58 | ESD | HGD | Severe IM |
ESD, endoscopic submucosal dissection; FDR, first-degree relative with gastric cancer; HGD, high-grade adenoma/dysplasia; IM, intestinal metaplasia; NA, not applicable; OLGA, operative link on gastritis assessment; OLGIM, operative link on gastric intestinal metaplasia; Tx, last endoscopy before treatment.