Incidence and clinicopathologic features of gastrointestinal stromal tumors. A population-based study

BMC Cancer

Table 3 Distribution of metastatic events according to tumor and patient characteristics

	Number of events/number of cases	%	P-value*
Age
≤ 60 years	14/32	44	0.825
61–70 years	17/38	45
> 70 years	27/54	50
Location
Stomach	32/78	41	0.029
Small intestine	13/29	45
Other	13/17	76
Mitotic rate
< 5 per 50 HPF	12/62	19	< 0.001
5–10 per 50 HPF	16/27	59
> 10 per 50 HPF	30/35	86
Size
< 2 cm	3/20	15	< 0.001
2–5 cm	8/27	30
5–10 cm	15/35	43
> 10 cm	32/42	76
Gender
Male	26/58	45	0.721
Female	32/66	48
Symptoms
Yes	45/93	48	0.678
No	13/31	42
Tumor risk category
Very low	2/19	10	< 0.001
Low	4/19	21
Intermediate	5/22	23
High	47/64	73
Condensed risk group^#
LRG	11/60	18	< 0.001
HRG	47/64	73

ISSN: 1471-2407