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Barrett's international narrow band imaging group classification for Barrett's esophagus with narrow band imaging[8]
| Mucosal pattern | |
| Circular, ridged/villous, or tubular | Regular |
| Absent or irregular | Irregular |
| Vascular pattern | |
| Blood vessels situated regularly along or between mucosal ridges and/or showing normal long branching patterns | Regular |
| Focally or diffusely distributed vessels not following normal architecture of the mucosa | Irregular |
