Perfused vessel spacing (Figure 2B), on the other hand, was significantly decreased for both the VEGF121 (P<0.001) and FGF-1 (P<0.013) tumours, but not for the VEGF165 (P=0.15) (see Figures 1E–H for representative images of the green perfusion stain superimposed on the orange hypoxia stain). Here, FGF1 is linked to neoplasm.