FGFR2 and non-small cell lung carcinoma: Consistent with these observations, among the FGFRs and FGFs, FGFR1 and FGFR2 with FGF2, and FGF9 were frequently co-expressed in 33 NSCLC cell lines28, and FGFR1 mRNA expression levels were also significantly correlated with FGF2 and FGF9 mRNA levels in patients with SCLC33.