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

Figure 7 Immunohistochemistry of CD31 in three groups. A: CD31 immunohistochemistry plot in normal group (IHC × 100); B: CD31 immunohistochemistry plot in normal group (IHC × 200). In the normal group, no obvious stained vascular endothelial cells or endothelial cell clusters were found; C: CD31 immunohistochemistry plot in adenoma group (IHC × 100); D: CD31 immunohistochemistry plot in adenoma group (IHC × 200). In the adenoma group, a few vascular endothelial cells were found to be colored brown; E: CD31 immunohistochemistry plot in colorectal cancer (CRC) group (IHC × 100); F: CD31 immunohistochemistry plot in CRC group (IHC × 200). In CRC group, a large number of brown vascular endothelial cells were observed. IHC: Immunohistochemistry.