Magnifying narrow-band imaging with acetic acid to diagnose early colorectal cancer

Figure 1 Magnifying endoscopy of early colorectal adenocarcinoma. A: M-NBI shows the vascular pattern and the surface pattern; however, the surface pattern is obscure; B: MA-NBI effaces the vascular pattern and accentuates the surface pattern; C: M-CV provides a clear pit pattern. M-NBI: Magnifying endoscopy with narrow-band imaging; MA-NBI: Magnifying endoscopy with acetic acid spray and narrow-band imaging; M-CV: Magnifying endoscopy with crystal violet dye.

Figure 2 Comparison of the areas under the receiver operating characteristic curves of 10 colonoscopists for differentiating early colorectal adenocarcinomas from adenomas. M-NBI: Magnifying endoscopy with narrow-band imaging; MA-NBI: Magnifying endoscopy with acetic acid spray and narrow-band imaging; M-CV: Magnifying endoscopy with crystal violet dye; NS: Not significant.

Figure 3 Comparison of the proportions in which predictions were made with high confidence. M-NBI: Magnifying endoscopy with narrow-band imaging; MA-NBI: Magnifying endoscopy with acetic acid spray and narrow-band imaging; M-CV: Magnifying endoscopy with crystal violet dye; NS: Not significant.