Distribution of histology for oesophageal surface patterns seen during NBI
| Areas | No IM | IM | LGD | HGD | OAC | |
| Circular mucosal pattern | 33 | 7 (21) | 23 (70) | 3 (9) | 0 (0) | 0 (0) |
| Normal vascular pattern | 31 | 7 (22) | 21 (68) | 3 (10) | 0 (0) | 0 (0) |
| Abnormal vascular pattern | 2 | 0 (0) | 2 (100) | 0 (0) | 0 (0) | 0 (0) |
| Ridged/villous mucosal pattern | 143 | 39 (27) | 80 (56) | 24 (17) | 0 (0) | 0 (0) |
| Normal vascular pattern | 132 | 37 (28) | 74 (56) | 21 (16) | 0 (0) | 0 (0) |
| Abnormal vascular pattern | 10 | 2 (20) | 5 (50) | 3 (30) | 0 (0) | 0 (0) |
| Unknown vascular pattern | 1 | 0 (0) | 1 (100) | 0 (0) | 0 (0) | 0 (0) |
| Irregular mucosal pattern | 69 | 1 (1) | 23 (33) | 27 (39) | 14 (20) | 4 (6) |
| Normal vascular pattern | 14 | 0 (0) | 8 (57) | 4 (28) | 2 (14) | 0 (0) |
| Abnormal vascular pattern | 55 | 1 (2) | 15 (27) | 23 (42) | 12 (22) | 4 (7) |
| Absent mucosal pattern | 19 | 6 (31) | 6 (31) | 7 (37) | 0 (0) | 0 (0) |
| Normal vascular pattern | 14 | 5 (36) | 4 (28) | 5 (36) | 0 (0) | 0 (0) |
| Abnormal vascular pattern | 5 | 1 (20) | 2 (40) | 2 (40) | 0 (0) | 0 (0) |
Results are shown as number (%).
OAC, oesophageal adenocarcinoma; HGD, high-grade dysplasia; IM, intestinal metaplasia; LGD, low-grade dysplasia.