| Site of the pathology | Frequency | Percentage | |
| Esophagus | Esophagitis | 27 | 5.9 |
| Esophageal tumor | 14 | 3 | |
| Esophageal varices | 12 | 2.6 | |
| Hiatal hernia | 1 | 0.2 | |
| Megaesophageal recurrence | 1 | 0.2 | |
| Subtotal | 55 | 11.83 | |
| Stomach | Gastritis | 67 | 14.4 |
| Gastric tumor | 28 | 6 | |
| Gastric ulcer | 14 | 3.01 | |
| Portal hypertensive gastropathy | 10 | 2.1 | |
| Polyps | 6 | 1.3 | |
| Stomitis | 1 | 0.2 | |
| Sub total | 126 | 27.1 | |
| Duodenum | Duodenal ulcer | 9 | 1.9 |
| Duodenitis | 2 | 0.4 | |
| Sub total | 11 | 2.3 | |