Table 2.

IHC scores for HER family in 453 GISTs (405 GISTs with operation only and 48 high-risk GISTs with imatinib adjuvant therapy)

	EGFR	%	HER2	%	HER3	%	HER4	%
Score
0	28	6.2	39	8.6	434	95.8	20	4.4
1	172	38.0	177	39.1	19	4.2	209	46.1
2	253	55.8	237	52.3	0	0.0	224	49.4
Total	453	100.0	453	100.0	453	100.0	453	100.0