Table 2.

Comparison of clinicopathologic parameters accord-ing to the risk groups of gastrointestinal stromal tumors

Parameter\Risk group		Very low and low (n = 36)	Intermediate and high (n = 19)	P
Cellularity	Low	11	0
	Intermediate	22	15	0.019
	High	3	4
Nuclear atypia	Mild	22	5
	Moderate	12	9	0.019
	Severe	2	5
Necrosis	Absent	34	10	0.000
	Present	2	9
Hemorrhage	Absent	28	10	0.055
	Present	8	9
Infiltrative	Absent	22	8	0.178
Growth pattern	Present	14	11
Tumor cell type	Spindle	29	11	0.001
Epithelioid		7	8