Expression of Ets-1 proto-oncoprotein in gastrointestinal stromal tumors, leiomyomas and schwannomas

Table 1 Ets-1 immunohistochemistry in intestinal stromal tumors. n (%)

	n	-	+	++
GISTs	28	1 (3.6)	4 (14.3)	23 (82.1)a
Leiomyomas	9	3 (33.3)	3 (33.3)	3 (33.3)
Schwannomas	6	1 (16.7)	1 (16.7)	4 (66.7)

^aP<0.005 vs leiomyomas.

Table 2 Ets-1 immunohistochemistry and risk categories in GIST. n (%)

	n	-	+	++
Total	28	1 (3.6)	4 (14.3)	23 (82.1)
Risk categories
High	4	0 (0.0)	0 (0.0)	4 (100.0)
Intermediate	5	0 (0.0)	0 (0.0)	5 (100.0)
Low	14	1 (7.1)	3 (21.4)	10 (71.4)
Very low	5	0 (0.0)	1 (20.0)	4 (80.0)
Mitosis counts (per 50 HPF)
< 2	14	1 (7.1)	3 (21.4)	10 (71.4)
2-5	6	0 (0.0)	1 (1.7)	5 (83.3)
6-10	3	0 (0.0)	0 (0.0)	3 (100.0)
10<	5	0 (0.0)	0 (0.0)	5 (100.0)
Tumour size (cm)
< 2	5	0 (0.0)	1 (20.0)	4 (80.0)
2-< 5	18	1 (5.6)	3 (16.7)	14 (77.8)
5-< 10	4	0 (0.0)	0 (0.0)	4 (100.0)
10<	1	0 (0.0)	0 (0.0)	1 (100.0)