Table 2.

HER2 distribution by IHC and FISH

HER2		FISH
		Positive	Negative	Equivocal	Not available	Total
IHC	Positive (3+)	29	5	2	1	37
	Equivocal (2+)	2	13	-	4	19
	Negative (1+)	2	91	1	7	101
	Negative (0)	1	86	-	9	96
	Not available	-	4	-	-	4
	Total	34	199	3	21	257

FISH, fluorescence in situ hybridization; HER2, human epidermal growth factor receptor 2; IHC, immunohistochemistry.