Figure 1

FISH with an EGFR probe (green) and 7q control probe (red) in nonsmall cell lung carcinoma sections demonstrating (a) no amplification, (c) low polysomy, (e) high polysomy, and (g) gene amplification. The corresponding slides treated by CISH with the EGFR probe are shown in (b), (d), (f), and (h).