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- W2411941741 abstract "We investigated the biological behavior of proximal and distal colorectal adenocarcinomas (CRC), intending to determine specific segmental differences, possibly arising from the distinct genetic pathways involved in their development.Thirty-six proximal and 83 distal cancers were comparatively and retrospectively analyzed, regarding tumor stage, grade and Ki-67, p53 and Bcl-2 immunohistochemical expression.Proximal tumors were more likely to be poorly differentiated (p=0.005) and to exhibit low Ki-67 and p53 expression (<20% and ≤ 30% stained nuclei respectively; p=0.026 and 0.0014, respectively). Distal lesions were more likely to be moderately differentiated (p=0.001), to display moderate Ki-67 expression (20-50% stained nuclei, p= 0.013) and p53 staining higher than 30% stained nuclei (p= 0.0014). Such segmental variations regarding mainly p53 and to a lesser extent Ki-67 were seen within most of the specific sub-groups of patients (stratified by stage, grade, gender and age). An association between Bcl-2 expression and distal site was also observed among females (p=0.008).Proximal and distal cancers displayed different clinicopathological and molecular patterns, reinforcing the proposal that they are genetically and biologically different entities. Potential clinical applications of these findings should be investigated." @default.
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- W2411941741 date "2011-06-16" @default.
- W2411941741 modified "2023-09-27" @default.
- W2411941741 title "Site impact on colorectal cancer biological behavior in terms of clinicopathological and molecular features." @default.
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