Comparison of endoscopic ultrasonography features and pathological staging of gastric inflammatory fibroid polyps

Table 1 Endoscopic ultrasonographic features of gastric inflammatory fibroid polyps, n (%)

EUS features
Origin, layer1
2nd	7 (13.2)
3rd	9 (17.0)
2nd + 3rd	37 (69.8)
Echogenicity, level2
1	10 (18.9)
2	36 (67.9)
3	4 (7.5)
1 + 43	3 (5.7)
Homogeneticy
Homogeneous	48 (90.6)
Heterogeneous	5 (9.4)
Margin
Distinct	9 (17)
Indistinct	44 (83)
Size
< 10 mm	17 (32.1)
10 mm-20 mm	28 (52.8)
> 20 mm	8 (15.1)

¹The second layer is the deep layer of the mucosa, the third layer is the submucosa and the interface between the submucosa and the muscularis propria.

²Level 0 corresponds to the anechoic pattern, level 1 corresponds to the fourth layer of the gastric wall, presenting as hypoechoic, level 2 corresponds to the echo of the splenic parenchyma, showing medium-low echo, the echo of level 3 is between level 2 and level 4, presenting as medium-high echo, level 4 corresponds to the third layer of the gastric wall, showing high echo.

³The combined echo pattern of level 2 and 4.

EUS: Endoscopic ultrasonography.

Table 2 Relationship between endoscopic features and pathological stage of gastric inflammatory fibroid polyps

Pathological stage
EUS features	Nodular stage	Fibrovascular stage	Sclerotic stage	χ2/H value	P value
Origin, layer1				2.504	0.667
2nd	0	7	0
3rd	0	7	2
2nd + 3rd	4	29	4
Echogenicity, level2
1	4	5	1	25.942	< 0.001
2	0	35	1
3	0	2	2
1 + 43	0	1	2
Homogeneticy
Homogeneous	4	42	2	15.076	< 0.001
Heterogeneous	0	1	4
Margin
Distinct	0	9	0	1.397	0.500
Indistinct	4	34	6
Size (mm), interquartile range	9.35 (6.45, 10.98)	12.00 (8.00, 18.00)	12.80 (10.45, 21.65)	3.059	0.217

¹The second layer is the deep layer of the mucosa, the third layer is the submucosa and the interface between the submucosa and the muscularis propria.

²Level 0 corresponds to the anechoic pattern, level 1 corresponds to the fourth layer of the gastric wall, presenting as hypoechoic, level 2 corresponds to the echo of the splenic parenchyma, showing medium-low echo, the echo of level 3 is between level 2 and level 4, presenting as medium-high echo, level 4 corresponds to the third layer of the gastric wall, showing high echo.

³The combined echo pattern of level 2 and 4.

EUS: Endoscopic ultrasonography.