Table 2.

Breast tumor samples and their corresponding immunohistochemistry (IHC), chromogenic in situ hybridization (CISH) results, and tumor histologic grade

IHC score	No. of tests	CISH amplification			Histologic grade
		Negative	Low	High	1	2	3
0	40	40	0	0	1	33	6
1+	40	40	0	0	3	28	9
2+	40	22	8	10	0	24	16
3+	40	0	9	31	0	27	13
Total	160	102	17	41	4	112	44