Correlation between magnifying narrow band imaging and histopathology in gastric protruding/or polypoid lesions: a pilot feasibility trial

Table 2 Prevalence of fine mucosal structures and micro vascular patterns seen by magnying NBI, among gastric protruding/or polypoid lesion, and diagnostic efficacy of those patterns for GN

	Histopathological diagnosis			Diagnostic efficacy for GN
	FGP	HP	GN	Sensitivity (%)	Specificity (%)
Fine mucosal structures
Small round	18(94.7)	2(4.3)	3(10.3)	10.3	69.7
Prolonged	0(0)	15(31.9)	1(3.5)	3.5	77.3
Villous or ridge	1(5.3)	30(63.8)	20.(69.0)	69.0	53.0
Unclear	0(0)	0(0)	5(17.2)	17.2	100
Micro vascular patterns
Honey comb	18(94.7)	2(4.3)	0(0)	0	69.7
Dense vascular	0(0)	44(93.6)	4(13.8)	13.8	33.3
Core vascular	1(5.3)	1(2.1)	21(72.4)	72.4	97.0
Fine net work	0(0)	0(0)	3(10.3)	10.3	100
Unclear	0(0)	0(0)	1(3.5)	3.5	100
Combined of fine mucosal structures and micro vascular patterns
Small round/Honey comb	18(94.7)	2(4.3)	0(0)	0	69.7
Prolonged/Dense vascular	0(0)	14(29.8)	0(0)	0	78.8
Villous or ridge/Dense vascular	0(0)	30(63.8)	4(13.8)	13.8	54.5
Small round/Fine net work	0(0)	0(0)	3(10.3)	10.3	100
Prolonged/Core vascular	0(0)	0(0)	1(3.5)	3.5	100
Villous or ridge/Core vascular	1(5.3)	1(2.1)	16(55.2)	55.2	97.0
Unclear/Core vascular	0(0)	0(0)	4(13.8)	13.8	100
Unclear/Unclear	0(0)	0(0)	1(3.5)	3.5	100

FGP fundic grand polyps; HP, hyperplastic polyps; GN, gastric neoplasia; ND, not done
Most favourable combination of micro vascular pattern for diagnosing GN were; Core vascular+ fine network+ unclear: sensitivity 86.2%, specificity 97.0%
Most favourable combination of fine mucosal structures and micro vascular pattern for diagnosing GN were; small round/fine net work+ prolonged/core vascular+ villous or ridge/core vascular+ unclear/core vascular+ unclear: sensitivity 86.2%, specificity 9.0%

ISSN: 1471-230X