[Correlation between expression of vascular endothelial growth factor and prognosis of patients with esophageal squamous cell carcinoma].

BACKGROUND & OBJECTIVES: Angiogenesis plays an essential role in tumor growth, invasion, and metastasis. Vascular endothelial growth factor(VEGF) is regarded the most important angiogenetic growth factor and it has been found in many kinds of tumors that its high expression can promote tumor progression and effect prognosis. However, there was few reports about the relationship between the VEGF expression and the progression and prognosis of the patients with esophageal carcinoma. The current study was designed to investigate the relationship between VEGF expression and the prognosis of patients with esophageal squamous cell carcinoma.

METHODS

The expression of VEGF protein in 72 resected specimens from the patients with esophageal squamous cell carcinoma were examined immunohistochemically, and its effects on postoperative recurrence and survival of the patients were analyzed retrospectively.

RESULTS

Fourty-five out of 72 (62.5%) samples were positive for VEGF expression. The VEGF-positive patients tend to occur postoperative recurrence than VEGF-negative patients (P < 0.001). The median survival time and 1, 3, 5-year survival rate of VEGF-positive patients was lower than those of VEGF-negative patients. And the Kaplan-Meier survival curve was worse in VEGF-positive groups than in VEGF-negtive groups(Log rank test, P = 0.021). Multivariate analysis revealed that VEGF was not an independent factor that impact on the prognosis (P > 0.05).

CONCLUSIONS

The high expression of VEGF in esophageal squamous cell carcinoma may promote the tumor progression and lead to dismal prognosis. However, the value of VEGF expression for judging prognosis need further study.