Improved visibility of colorectal tumor by texture and color enhancement imaging with indigo carmine

Table 3 Visibility scores of margin and surface of adenomas for white light imaging, texture and color enhancement imaging, chromoendoscopy and texture and color enhancement imaging + chromoendoscopy

	WLI	TXI	CE	TXI + CE	WLI vs TXI, P value	TXI vs CE, P value	CE vs TXI + CE, P value
Margin, mean (SD)	2.54 (0.84)	3.00 (0.85)	3.46 (0.72)	3.81 (0.42)	< 0.001	< 0.001	< 0.001
Surface, mean (SD)	2.34 (0.75)	2.93 (0.79)	3.19 (0.70)	3.58 (0.56)	< 0.001	NS	< 0.001

The visibility score was defined as follows: Score 4, excellent (easily detectable); score 3, good (detectable without careful observation); score 2, fair (hardly detectable without careful examination); score 1, (not detectable without repeated careful examination). NS: Not significant; WLI: White light imaging; TXI: Texture and color enhancement imaging; CE: Chromoendoscopy; TXI + CE: Texture and color enhancement imaging + chromoendoscopy.