Image-enhanced endoscopy for diagnosis of colorectal tumors in view of endoscopic treatment

Table 2 Reports about image-enhanced endoscopy with magnification for differentiation between neoplastic polyps and non-neoplastic polyps (%)

Ref.	System	No. of cases	Accuracy	Sensitivity	Specificity	PPV	NPV
Machida et al[12]	NBI	43	93.4	100.0	75.0	91.2	100.0
Sano et al[14]	NBI	150	95.3	96.4	92.3	97.3	90.0
Wada et al[35]	NBI	617	96.7	90.9	97.1	-	-
Tanaka et al[17]	NBI	289	98.9	100.0	98.9	-	-
Togashi et al[6]	FICE	107	87.0	93.0	70.0	90.0	76.0
dos Santos et al[20]	FICE	111	92.8	97.8	79.3	93.0	92.0

NBI: Narrow-band imaging; FICE: Flexible spectral imaging color enhancement; PPV: Positive predictive value; NPV: Negative predictive value.