KIT-negative gastrointestinal stromal tumors with a long term follow-up: A new subgroup does exist

Table 1 Clinicopathological features of KIT-negative cases

CaseNo.	Sex	Age (yr)	Symptoms	Site	Size	Mitoses(/50 HPF)	Presenceof necrosis	Morphology	Risk category	Clinicalstatus	Survivaldata/mo
					(cm)
1	M	60	Yes	Small Intestine	4.30	1	No	Epithelioid	Low risk	Primary	Alive/12
2	M	46	No	Stomach	0.50	0	No	Mixed	Very low risk	Primary	Alive/24
3	M	50	No	Small Intestine	0.50	0	No	Anaplastic	Very low risk	Primary	Alive/24
4	M	64	Yes	Large Intestine	4.50	10	Yes	Epithelioid	High risk	Liver metastasis	Dead/12
5	M	78	Yes	Small Intestine	7.00	1	Yes	Mixed	Intermediate risk	Liver metastasis	Dead/12
6	F	53	Yes	Stomach	5.00	0	No	Spindled	Low risk	Primary	Alive/47
7	M	43	Yes	Esophagus	7.00	0	No	Mixed	Intermediate risk	Primary	Alive/25
8	M	51	Yes	Small Intestine	6.00	2	Yes	Epithelioid	Intermediate risk	Primary	Alive/12
9	M	69	No	Stomach	2.00	0	No	Mixed	Very low risk	Primary	Alive/37
10	M	54	Yes	Stomach	3.50	0	No	Spindled	Low risk	Primary	Alive/62
11	M	70	Yes	Stomach	6.00	0	No	Anaplastic	Intermediate risk	Primary	Alive/82
12	M	42	Yes	Stomach	6.00	2	No	Anaplastic	Intermediate risk	Primary	Alive/56
13	M	26	No	Stomach	0.50	0	No	Epithelioid	Very low risk	Primary	Alive/78
14	M	82	Yes	Stomach	30.00	6	Yes	Mixed	High risk	Primary	Alive/82
15	M	61	Yes	Small Intestine	3.00	29	No	Mixed	High risk	Liver metastasis	Dead/2

M = male; F = female.