Six cases of villous adenoma of the duodenum are described and compared to the 6 previously reported in the literature. The overall incidence of malignant degeneration is 46%, which is comparable to the incidence reported for villous tumors arising in the stomach (58%) and colon (34-79%). Duodenal villous adenomas are morphologically similar to their colonic counterparts. The cauliflower-like appearance so characteristic of these tumors is best delineated by hypotonic duodenography.
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Ring et al. (1972) studied this question.
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