507597.fig.004a
(a)
507597.fig.004b
(b)
Figure 4: SCC in middle esophagus (mucosal invasion: proper mucosal layer; depressed type; 12 mm). (a) NBI endoscopy revealed demarcated area brownish in color with NBI image visualization quality rated as poor for delineating less than one-third of lesion margin circumference as most of lesion margin appeared dim (white arrows). (b) AFI endoscopy revealed demarcated area magenta in color with AFI image visualization quality rated as fair for delineating approximately one-half of lesion margin circumference as remaining portion of lesion margin appeared dim (white arrows).