An antibody against the fibroblast growth factor receptor type 2 (FGFR2), with potential antineoplastic activity. Upon administration, the anti-FGFR2 antibody BAY1179470 binds to and inhibits FGFR2, which may result in the inhibition of both FGFR2 phosphorylation and FGFR2-mediated signal transduction pathways. This results in the inhibition of cell proliferation and the induction of cell death of FGFR2-expressing tumor cells. FGFR2, upregulated in many tumor cell types, is a receptor tyrosine kinase, which is essential to tumor cellular proliferation, differentiation and survival.