Additional file 1 of Effect of educational lecture on the diagnostic accuracy of Japan NBI Expert Team classification for colorectal lesions

Additional file 1: Fig. 3. Cases where JNET Type1 was misdiagnosed as Type 2A or 2B. a: The vessels surrounding the normal crypt are visible; however, the surface pattern is uniform honeycomb-like with regular dark spots. b: The vessel pattern is hardly visible and the normal crypts show white or dark spots. c: Isolated lacy vessels are seen and the vessels surrounding the normal crypt are visible; however, the surface pattern is uniform honeycomb-like with regular dark spots. d: The vessels surrounding the normal crypt and the isolated lacy vessels are partially visible. JNET: Japan NBI expert team. Fig. 4. Cases where JNET Type 2A was misdiagnosed as Type 2B. a-c: Lesions with various vessel patterns (not regular) are seen; however, a pit-like structure with smooth margin and regular structure (regular surface pattern) is seen. d, e: The edge of the vessel is irregular and partially disrupted; however, the pit-like structure is regular (regular surface pattern). JNET: Japan NBI expert team. Fig. 5. Misdiagnosis in cases of JNET Type 2B and 3. a: A case of Type 2B misdiagnosed as Type 3. Variable-caliber vessels and pit-like structure (the irregular surface pattern) are present. b: A case of Type 3 misdiagnosed as Type 2B. The vessels show irregular margins and distribution, also, disrupted. On the other hand, the surface structure is amorphous. JNET: Japan NBI expert team.