AIM: Human heparanase is an endo-D-glucuronidase that degrades heparan sulfate/heparin and has been implicated in a variety of biological processes. The objective was to investigate the expression of heparanase (Hps) and basic fibroblast growth factor (bFGF) and their relationship to neoangiogenesis and metastasis of human esophageal carcinoma. METHODS: Seventy-nine patients who had undergone esophageal resection for esophageal carcinoma without preoperative treatment were included in the present study. Immunohistochemistry was used to study the expression of Hps, bFGF and microvessel density (MVD) in 79 cases of esoph-ageal carcinoma. bFGF and Hps were quantitatively detected with immunohistochemistry in 79 cases of human esopha-geal carcinoma and 19 cases of adjacent normal human esophageal carcinoma. Cd34 was used to explore the MVD as a marker of endothelial cells. RESULTS: Hps and bFGF expression in tumor tissue, being remarkably higher than that in normal esophageal tissue, were significantly correlated with clinicopathological features (depth of invasion, lymph-node metastasis and TNM stage) and MVD. CONCLUSION: The results of this study suggest that the coexpression of Hps and bFGF plays a key role in angiogenesis, invasion and metastasis of esophageal carcinoma. Hps and bFGF may serve as a predictor of progression in esophageal carcinoma. The expression of heparanase in esophageal carcinoma enhances growth, invasion, and angiogenesis of the tumor, and bFGF seems to be a potent antigenic factor for esophageal carcinoma. AIM: Human heparanase is an endo-D-glucuronidase that degrades heparan sulfate / heparin and has been implicated in a variety of biological processes. The objective was to investigate the expression of heparanase (Hps) and basic fibroblast growth factor (bFGF) and their relationship to neoangiogenesis and metastasis of human esophageal carcinoma. METHODS: Seventy-nine patients who had undergone esophageal resection for esophageal carcinoma without preoperative treatment were included in the present study. Immunohistochemistry was used to study the expression of Hps, bFGF and microvessel density ) in 79 cases of esoph-ageal carcinoma. bFGF and Hps were quantitatively detected with immunohistochemistry in 79 cases of human esopha-geal carcinoma and 19 cases of adjacent normal human esophageal carcinoma. Cd34 was used to explore the MVD as a marker of endothelial cells . RESULTS: Hps and bFGF expression in tumor tissue, being remarkably higher than that in normal esophageal tissue, were Conclusions correlated with clinicopathological features (depth of invasion, lymph-node metastasis and TNM stage) and MVD. CONCLUSION: The results of this study suggest that the coexpression of Hps and bFGF plays a key role in angiogenesis, invasion and metastasis of esophageal carcinoma. Hps and bFGF may serve as a predictor of progression in esophageal carcinoma. The expression of heparanase in esophageal carcinoma enhances growth, invasion, and angiogenesis of the tumor, and bFGF seem to be a potent antigenic factor for esophageal carcinoma.