FGFR2 and hydrops fetalis: Even if the anti-FGFR2 antibody used for blotting does not discriminate between FGFR2 isoforms, the origin of the HF cultures from dermal specimens displaying undetectable levels of the epithelial FGFR2b isoform (refers to Figure 1A) indicated that the band detected at the molecular weight of FGFR2 correspond to the mesenchymal FGFR2c variant.