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- W2065824279 abstract "Gallbladder carcinoma has two main morphologic developmental pathways: a dysplasia–carcinoma sequence and an adenoma–carcinoma sequence. β-Catenin is a key regulator of the cadherin-mediated cell adhesion system, and altered expression and mutation of β-catenin have been identified in many human malignancies. To clarify its role in gallbladder carcinogenesis, we investigated mutation and immunohistochemical expression of β-catenin in adenomas, dysplasias, and carcinomas. We classified adenomas according to the expression of apomucins and cytokeratin and compared the mutational and expression pattern among each type. β-Catenin mutations were identified in 58% (14 of 24) of the adenomas, and they were absent from all carcinomas (37 cases) and dysplasias (13 cases). Altered expression of β-catenin, such as nuclear or cytoplasmic expression and loss of membranous expression, was also significantly higher in adenomas than in dysplasias or carcinomas (p <0.001). Of the adenomas, papillary adenomas and tubular adenomas of intestinal type showed infrequent β-catenin abnormality, which was similar to the carcinomas. The cytoplasmic and nuclear expression of β-catenin in carcinomas was correlated with less aggressive tumor behavior; in particular, cytoplasmic expression was associated with improved patient outcome (p = 0.028). Gallbladder adenoma may be a heterogeneous entity, and the majority of adenomas are not responsible for carcinoma progression." @default.
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- W2065824279 date "2002-06-01" @default.
- W2065824279 modified "2023-10-14" @default.
- W2065824279 title "Mutation and Altered Expression of β-Catenin During Gallbladder Carcinogenesis" @default.
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- W2065824279 doi "https://doi.org/10.1097/00000478-200206000-00009" @default.
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