Abstract
Angiogenesis (as microvascular density-MVD) and vascular endothelial growth factor (VEGF) expression were evaluated by immunohistochemistry in all types of human pre-invasive breast lesion, un-associated with invasive carcinoma, including florid ductal hyperplasia of usual type (FDHUT, 40 cases), atypical ductal hyperplasia (ADH, 10), well-differentiated intraductal carcinoma (WDIC, 16), intermediately differentiated intraductal carcinoma (IDIC, 25), poorly differentiated intraductal carcinoma (PDIC, 20), atypical lobular hyperplasia (ALH, 13), and lobular carcinoma in situ (LCIS, 12). Both parameters were also studied in normal glandular structures obtained from normal breasts or from breasts containing pre-invasive lesions. Increased vascularization was present in all lesion types (MVD mean values (expressed as vessel number/mm(2)): 115 +/- 8 in normal lobules, 146 +/- 26 in lesions; p < 0.05) and increased with lesion severity. In ductal lesions, MVDs were significantly higher in PDIC (190 +/- 65) and IDIC (167 +/- 61) than in FDHUT (123 +/- 40) and ADH (122 +/- 47); MVD was much higher in PDIC than in WDIC (p < 0.001). WDIC showed peculiar features, with a degree of vascularization closer to hyperplasia than to the other hi...Continue Reading
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