FLT1 and neoplasm: Expression of full-length forms of the VEGF/PLGF receptors KDR and Flt-1 were reduced (p = 0.0254 and p = 0.0348, respectively) in CSCC relative to NHS, whereas expression of the alternatively spliced decoy receptor sFlt-1 was indistinguishable in tumor and control samples (p = 0.17) (Figure 5).