FGFR1 and cancer: Fibroblast growth factor receptors (FGFRs) that constitute a group of four receptor tyrosine kinases (RTKs) (FGFR1-FGFR4) emerged recently as attractive molecular targets for selective cancer treatment (Porębska et al. 2018; Dieci et al. 2013; Szlachcic et al. 2016).