Objective: To study NO, VEGF and MVD in HCC involving in development of HCC. Methods: Nitric oxide synthase (NOS), VEGF expression and MVD were detected in 51 HCC and the paracancerous liver tissue by irnniunohistochemistry and histological techniques. Results: iNOS expression levels in HCC were lower than those in paracancerous liver tissue (P5 cm) (P |