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|Type:||Artigo de periódico|
|Title:||Angiogenic And Lymphangiogenic Microvessel Density Inrecurrent Pleomorphic Adenoma|
De Araujo V.C.
|Abstract:||Background: Recurrent pleomorphic adenoma (RPA) is an uncommon and challenging disease. The aim of this study was to determine if there is a difference between RPA and the pleomorphic adenoma (PA) without recurrence related to tumor blood and lymphatic vascularization. Moreover, we compared the microvessel density (MVD) between cell-rich areas (predominance of epithelial cells) and cell-poor areas (predominance of myxoid and chondroid areas) of the stroma of PA and RPA. In addition, immunohi stochemical staining for the Ki-67 antigen was conducted simultaneously to evaluate cell proliferation in PA and RPA. Methods: A total of 19 cases of PA and 24 cases of RPA, blood, and lymphatic vessels were analyzed by immunohi stochemical technique using the antibodies CD34, CD105, D2-40, and Ki-67. Results: Comparingno recurrent with recurrent tumor, no significant difference was found in terms of lymphatic vessel density, MVD, and proliferation index. When MVD and proliferation index were compared with different areas in cellular composition (cell-rich andcell-poor areas), there was a significant difference in PA, as well as in RPA. Conclusion: This study shows that although RPA presents more aggressive clinical behavior than PA, there is no difference between tumor blood and lymphatic vascularization, suggesting that there is no correlation between vascularity and risk of recurrence. Furthermore, vascularized stroma in PA, as well as RPA, depends on the proportion of the cellular composition. copyright © 2009 John Wiley & Sons A/S.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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