Clinical evaluation of endoscopic resection for treatment of large gastric stromal tumors

Table 3 Characteristics of preoperative examination of gastric stromal tumors with different pathological grades

Pathological grade	Tumor volume	Ulcer bleeding	Liquefaction	None1	Both2
Low risk	< 27 cm3 (63)	11/49	1/49	36/49	1/49
	27-125cm3 (74)	18/48	10/48	19/48	1/48
	125-1000 cm3 (0)	0	0	0	0
	≥ 1000 cm3 (0)	0	0	0	0
Moderate risk	< 27 cm3 (3)	1/3	0/3	2/3	0/3
	27-125cm3 (36)	17/28	7/28	2/28	2/28
	125-1000 cm3 (39)	5/19	3/19	7/19	4/19
	≥ 1000 cm3 (0)	0	0	0	0
High risk (46)	< 27 cm3 (0)	0	0	0	0
	27-125cm3 (7)	1/5	0/5	1/5	3/5
	125-1000 cm3 (24)	6/14	0/14	1/14	7/14
	≥ 1000 cm3 (15)	0/2	0/2	0/2	2/2
P-value		1.15	0.62	eP < 0.05	dP < 0.01

None¹: No ulcer bleeding or tumor liquefaction. Both²: Ulcer bleeding and tumor liquefaction. Low-risk stromal tumors vs medium-risk stromal tumors, moderate risk vs high risk, and low risk vs high risk were found to be statistically significant (^fP < 0.01, ^gP < 0.05, ^hP < 0.01).