以下为句子列表：
英文: A villous adenoma averages several centimeters in diameter, and may be up to 10 cm.
中文: 绒毛状腺瘤直径一般几厘米，可以达到10个厘米。
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英文: Microscopically, a villous adenoma is shown at its edge on the left, and projecting above the basement membrane at the right.
中文: 显微镜下，左侧见绒毛状腺瘤边缘，右侧见突破基底膜。
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英文: The edge of the carcinoma arising in the villous adenoma is seen here.
中文: 图示绒毛状腺瘤恶变的癌边缘。
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英文: The neoplastic glands are long and frond-like, similar to those seen in a villous adenoma.
中文: 肿瘤腺体长并呈叶状，与绒毛状腺瘤所见相似。
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英文: Though villous adenomas are less common than adenomatous polyps, they are much more likely to have invasive carcinoma in them (about 40% of villous adenomas).
中文: 虽然绒毛状腺瘤不如腺瘤息肉那么常见，但更有可能恶变为癌（大约40%的绒毛腺瘤）。
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