Table 3.

Immunohistochemical and FISH data

Case no.	c-erbB-1 (clone EGFR.25) (internal domain)	c-erbB-1 (clone EGFR.113) (external domain)	c-erbB-2 (clone CB11) (internal domain)	c-erbB-2 (clone 3B5) (internal domain)	c-erbB-2 (clone 5A2) (internal domain)	c-erbB-3	c-erbB-4	EGFR gene amplification (FISH)
1	9	9	4	6	6	9	4	Yes
2	9	1	0	9	3	4	2	No
3	6	0	4	3	1	9	0	No
4	6	1	1	9	0	0	0	No
5	0	0	4	6	2	6	4	No
6	1	9	1	4	0	4	0	Yes
7	9	9	0	1	0	0	0	No
8	6	2	0	6	4	6	4	Yes
9	9	9	2	6	0	6	6	No
10	9	9	0	9	1	9	4	Yes
11	4	0	2	6	0	4	4	Yes
12	9	4	0	6	2	9	2	Yes
13	9	2	4	6	1	9	2	No
14	4	0	0	1	0	0	0	No
15	2	1	0	9	1	6	0	No
16	6	0	0	4	0	6	1	No
17	9	2	0	9	4	9	2	No
18	4	1	6	9	1	4	4	No
19	4	0	0	1	0	4	0	Yes
20	6	1	1	6	0	6	1	Yes
21	6	4	1	6	0	4	2	No
22	9	6	2	6	6	4	2	No
23	9	3	0	6	0	1	0	No
24	6	0	0	6	3	6	2	No
25	6	2	1	6	3	9	2	No
26	6	4	6	6	2	4	1	Yes
27	6	0	0	1	0	2	1	No
28	6	1	0	4	0	4	1	No
29	9	6	0	4	0	0	1	No
30	3	0	0	4	0	2	2	No
31	6	1	0	9	3	9	6	No
Median Staining Index	6	1	0	6	1	4	2
No. of positive cases/Total no. of cases	30/31	22/31	14/31	31/31	16/31	27/31	23/31	9/31
Percentage positivity	97%	71%	45%	100%	52%	97%	74%	29%