FGFR2b is a member of the?fibroblast growth factor receptor?family, where amino acid sequence is highly conserved between members and throughout evolution. The extracellular portion of the protein interacts with fibroblast growth factors, setting in motion a cascade of downstream signals, ultimately influencing?mitogenesis?and?differentiation.?FGFR2b has important roles in embryonic development and tissue repair, especially bone and blood vessels. Recent studies have found that about 30% of patients overexpress FGFR2b protein, which may be used as a new biomarker and research target for gastric cancer.