Tumor angiogenesis in breast cancer: Its importance as a prognostic indicator and the association with vascular endothelial growth factor expression |
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Authors: | Masakazu Toi Kazuo Inada Hideo Suzuki Takeshi Tominaga |
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Affiliation: | (1) Dept. of Surgery, Tokyo Metropolitan Komagome Hospital, 3-18-22, Honkomagome, Bunkyo-ku, 113 Tokyo, Japan;(2) Tsukuba Res. Lab., Toagosei Co, Ltd., 2 Ohkubo, Tsukuba, 300-33 Ibaraki, Japan |
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Abstract: | Summary The importance of tumor angiogenesis in the process of tumor growth and progression in solid tumors has been widely accepted. We have investigated the significance of tumor angiogenesis as a prognostic indicator in a retrospective study including 328 primary breast cancer patients. The postoperative survey demonstrated that the microvessel density (MVD) evaluated by immunocytochemical staining for factor VIII-related antigen is a potent prognostic indicator. The relapse-free survival (RFS) rate of patients with over 100 microvessels/mm2 in a microscopic field was significantly worse compared to that of patients with less than 100 microvessels/mm2 (p<0.00001). The significance of MVD was found in both node-negative and node-positve patients (p< 0.005 and p<0.01, respectively). Multivariate analysis confirmed that MVD is an independent prognostic indicator for RFS. In the background factor analysis, MVD was significantly correlated with the number of metastatic nodes (p<0.01). In addition, the immunocytochemical analysis for vascular endothelial growth factor (VEGF) demonstrated a close association between the increase in MVD and the expression of VEGF (p<0.001). VEGF status also was a significant prognostic indicator in univariate analysis for RFS (p<0.01). It was concluded that MVD is a potent prognostic indicator in primary breast cancer. Furthermore, it was also suggested that VEGF plays crucial roles in the promotion of angiogenesis in breast cancer.Abbreviations MVD microvessel density - VEGF vascular endothelial growth factor |
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Keywords: | angiogenesis microvessel density vascular endothelial growth factor breast cancer |
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