Expression and significance of pigment epithelium-derived factor and vascular endothelial growth factor in colorectal adenoma and cancer

Figure 2 Comparison of positive expression rate and expression intensity of pigment epithelium-derived factors and vascular endothelial growth factors in normal control group, adenoma group and colorectal cancer group. A: Positive expression rate of pigment epithelium-derived factors (PEDF) in the three groups; B: Expression intensity of PEDF in the three groups; C: Positive expression rate of vascular endothelial growth factors (VEGF) in the three groups; D: Expression intensity of VEGF in the three groups. n = 50 (normal control group), n = 50 (adenoma group), n = 50 (colorectal cancer group). PEDF: Pigment epithelium-derived factors; VEGF: Vascular endothelial growth factors.