Advances in endoscopic dysplasia detection in inflammatory bowel disease

Figure 1 Preferred Reporting Items for Systematic Reviews and Meta-Analyses 2020 checklist.

Figure 2 Representative images of a Japanese Narrow band imaging Experts Team 2A/B lesion in the descending colon observed under dye-based chromoendoscopy. A: Methylene blue chromoendoscopy reveals a regular surface pattern with slight vascular irregularity, consistent with low-grade dysplasia features; B: Crystal violet staining enhances the pit pattern, demonstrating a type IV-VI Kudo pattern suggestive of possible high-grade dysplasia.