villous adenoma


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Related to villous adenoma: tubular adenoma

villous adenoma

[′vil·əs ‚ad·ən′ō·mə]
(medicine)
A slow-growing, potentially malignant neoplasm of the mucosa of the rectum; manifested by bleeding and mucoid diarrhea.
References in periodicals archive ?
While locally recurrent and metastatic adenocarcinomas have not been observed in association with villous adenoma of the renal pelvis, this type of aggressive behaviour has been observed in the bladder.
Given its rarity, there are no guidelines for follow-up or adjuvant treatment of intestinal-type villous adenoma in the renal pelvis following resection.
Intestinal type villous adenoma of the renal pelvis is challenging to diagnose prior to surgical resection but symptoms such as mucosuria, dysuria, flank and abdominal pain, as well as a history of recurrent urinary tract infections and urolithiasis, may be present.
Villous Adenoma of the Urinary Tract: A Report of 23 Cases, Including 8 With Coexistant Adenocarcinoma.
3] We feel that these lesions differ from classic tubular and villous adenomas in 2 principal respects: first, the proliferative activity, as demonstrated by Ki-67 staining, is seen throughout the lesions but predominantly at the base of crypts rather than the surface.