Figure 2. Correlation between the percentage of immuno-positive cells and microvessel density. (A) (FGF-2) No significant correlation is observed by Spearman rank correlation coefficient (p = 0.13, r = 0.23). (B) FGFR-1, (C) VEGF, (D) Flt-1. A significant correlation is observed (FGFR-1, p = 0.025, r = 0.34; VEGF, p = 0.0003, r = 0.53; Flt-1, p < 0.0001, r = 0.68).