Table 2.
Japanese NBI Expert Team Classification[45]
| JNET classification | JNET 1 | JNET 2A | JNET 2B | JNET 3 |
|---|---|---|---|---|
| Vessel pattern | Invisible | Regular caliber | Variable caliber | Loose vessel areas |
| Regular distribution (meshed or spiral pattern) | Irregular distribution | Interruption of thick vessels | ||
| Surface pattern | Regular dark or white spots | Regular (tubular/branched/papillary) | Irregular or obscure | Amorphous area |
| Similar to surrounding normal mucosa | ||||
| Most likely histology | Hyperplastic polyp | Low grade intramucosal neoplasia | High-grade intramucosal neoplasia | Deep submucosal invasive cancer |
| Sessile serrated lesion | Superficial submucosal invasive cancer |
JNET, Japan Narrow-Band Imaging (NBI) Expert Team.