Regarding TSA progression, TSAs show infrequent nuclear β-catenin expression, whereas advanced areas of TSAs show a highly significant increase in nuclear β-catenin staining, indicating that WNT/β-catenin signaling pathway activation is an important step in malignant progression [ 2 ].
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Endoscopic and Clinicopathological Features of a Colorectal Mucin-Rich Variant of Traditional Serrated Adenoma.
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