Long-term outcomes of endoscopic resection for small (≤ 4.0 cm) gastric gastrointestinal stromal tumors originating from the muscularis propria layer

Table 1 Demographic and clinicopathologic features of 229 gastric MP-GISTs n (%)

Parameters	Endoscopic resection (n = 229)
Age (yr), mean ± SD	54.9 ± 10.8
Gender
Male	86
Female	143
Tumor size (cm), median (interquartile range)	1.90 (1.55-2.40)
Tumor location
Cardia	29 (12.7)
Fundus	118 (51.5)
Body	72 (32.1)
Antrum	10 (3.3)
Tumor growth pattern
Intraluminal growth	178 (77.7)
Extraluminal growth	51 (22.3)
EUS characteristics
Homogeneous echo	197 (86.0)
Inhomogeneous echo	32 (14.0)
Mitotic index
< 5/50 HPF	219 (95.6)
5-10/50 HPF	8 ( 3.5)
≥ 10/50 HPF	2 ( 0.9)
NIH risk classification
Very low	147 (64.2)
Low risk	72 (31.4)
Intermediate risk	8 ( 3.5)
High risk	2 ( 0.9)

EUS: Endoscopic ultrasonography.