FGFR2 and neoplasm: Among the FGFR family members (FGFR1, FGFR2, FGFR3, and FGFR4), only FGFR2 was significantly upregulated in PanCK(+) tumor epithelial cells at the EOCC tumor invasive margin compared to the LOCC tumor invasive margin in NGDSP analysis (Fig. 5e, Supplementary Fig. 11a).