GI Calc
gicalc
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Esophagus
10
Stomach
15
Duodenum
7
Colorectum
19
Pathology
6
Bleeding
4
score/[id]
JA
/
EN
CLASSIFICATION
Classification
JNET classification (colorectal NBI magnifying)
NBI magnifying classification of colorectal tumors (Type 1 / 2A / 2B / 3).
Classification overview
•
Type 1 · Invisible vessels
•
Type 2A · Regular vessels and surface
•
Type 2B · Irregular vessels or surface
•
Type 3 · Loose vessels; amorphous surface
Type 1
Invisible vessels
Tap to enlarge
Lee 2021, Fig. 1A, Not original, CC BY-NC
Vessel
Invisible
Surface
Regular dark or white spots similar to surrounding normal mucosa
Histology
Hyperplastic polyp / sessile serrated polyp (SSP)
*1
If visible, the caliber in the lesion is similar to surrounding normal mucosa.
Type 2A
Regular vessels and surface
Tap to enlarge
Lee 2021, Fig. 1B, Not original, CC BY-NC
Vessel
Regular caliber; regular distribution (meshed/spiral pattern)
Surface
Regular (tubular / branched / papillary)
Histology
Low-grade intramucosal neoplasia
*2
Micro-vessels are often distributed in a punctate pattern and well-ordered reticular or spiral vessels may not be observed in depressed lesions.
Type 2B
Irregular vessels or surface
Tap to enlarge
Lee 2021, Fig. 1C, Not original, CC BY-NC
Vessel
Variable caliber; irregular distribution
Surface
Irregular or obscure
Histology
High-grade intramucosal neoplasia / shallow submucosal invasive cancer
*3
Deep submucosal invasive cancer may be included.
Type 3
Loose vessels; amorphous surface
Tap to enlarge
Lee 2021, Fig. 1D, Not original, CC BY-NC
Vessel
Loose vessel areas; interruption of thick vessels
Surface
Amorphous areas
Histology
Deep submucosal invasive cancer
Sano 2016, Fig. 7, Original
Lee 2021, Fig. 1, Not original, CC BY-NC
More reference figures
→
Reference
Original article
Sano Y et al. Dig Endosc 2016;28:526-533
Related tools
NICE classification (colorectal NBI, non-magnifying)
Non-magnifying NICE
CLASSIFICATION
NICE
→
WASP classification (HP / SSL / adenoma)
WASP classification
CLASSIFICATION
WASP
→
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Do not enter identifiable patient information or patient images.
Decision support only. Follow current guidelines and local protocols. Classification definitions and terminology follow the original publication language.
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