[Relationship between vascular endothelial growth factor expression and microvessel density in hepatocellular carcinomas and their surrounding liver tissue].

The relationship between vascular endothelial growth factor (VEGF) expression and microvessel density was studied with immunohistochemical method in hepatocellular carcinoma (HCC) and pericarcinomatous liver tissue. The positive rate of VEGF in HCCs was significantly lower than in surrounding liver tissues (66.7% vs. 85.4%, P < 0.05). There was no significant difference between HCC and pericarcinomatous liver tissue on expressive intensity of VEGF. The positive signal of VEGF was mainly localized in cytoplasma of cancer cells, pericarcinomatous hepatocytes, and vascular endothelial cells. The microvessel density in HCC was higher than in pericarcinomatous liver tissue and closely correlated to differentiated degree of cancer cells (rs = 0.5870; rs = 0.8235). The poorer cancer cell differentiation, the higher microvessel density. The results suggest that VEGF may not be the sole factor that stimulates angiogenesis in HCC genesis and development. To detect microvessel density in judging prognosis and biological behavior of HCC is more important than that of VEGF.