Uncommon causes include gastrinoma, medullary thyroid carcinoma ( which produces excess calcitonin ), factitious diarrhea from laxative abuse and villous adenoma.
2.
A pathologist at the hospital said no evidence of cancer was found in the 66 slices of the tumor, known as a villous adenoma, that were examined under a microscope.
3.
Unlike traditional colonic adenomas ( e . g . tubular adenoma, villous adenoma ), they do not ( typically ) have nuclear changes ( nuclear hyperchromatism, nuclear crowding, elliptical / cigar-shaped nuclei ).
4.
The villous subdivision are associated with the highest malignant potential because they generally have the largest surface area . ( This is because the villi are projections into the lumen and hence have a bigger surface area . ) However, villous adenomas are no more likely than tubular or tubulovillous adenomas to become cancerous if their sizes are all the same.
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