Table 4. Comparison of HER2 status assessed by both IHC and FISH on 39 histological sections obtained from metastatic sites of gastric carcinoma.

	FISH
	Negative, n (%)	Positive, n (%)
IHC score
Negative
0	12
1+	10
Equivocal (2+)	9	1
Positive (3+)		7

Abbreviations: FISH=fluorescence in situ hybridisation; HER2=human epidermal growth factor receptor 2; IHC=immunohistochemistry.

n=39.

Pearsons's R=0.829, P<0.001.