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Explain of Gastrointestinal Pathology

108.Colon, villous adenoma, composite low power microscopic

Microscopically, a villous adenoma is shown at its edge on the left, and projecting above the basement membrane at the right. The cauliflower-like appearance is due to the elongated glandular structures covered by dysplastic epithelium. 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).

（本图片资料来源自美国犹他大学）