Figure 2

Representative images of FGFR2b expression interpreted by immunohistochemistry as 3+ (a), 2+ (b), and 1+ (c). Immunohistochemistry results correlated well with copy numbers obtained by FISH. Samples designated as 3+, 2+, and 1+ show high amplification (d), moderate amplification (e), and mild copy number gain (f), respectively.