FGFR1 and adenocarcinoma: However, there have been some reports to the contrary; for example, a recent German study designed to further elucidate the relevance of FGFR1 in lung cancer found that the proportion of samples displaying ≥4 copies of the FGFR1 gene was numerically but not statistically higher for squamous versus adenocarcinoma histology (10.5% vs. 4.7%; P = 0.278) 35.