Objective To study the regularity of vascular endothelial growth factor (VEGF) expression and angiogenesis in primary esophageal squamous cell carcinoma and metastatic lymph nodes.

• 摘要目的：探讨食管鳞状细胞癌原发灶和淋巴结转移灶血管内皮生长因子(VEGF)表达及微血管形成的规律。