8261/0 Villous papilloma


Related terms

Villous adenoma, NOS

Definitions

Colon and rectum
ICD-O-3 topography code: C18-C20

Villous architecture is defined as leaf- or finger-like projections of epithelium overlying a small amount of lamina propria1
 
Bosman FT, Carneiro F, Hruban RH, Theise ND (Eds.)
WHO Classification of Tumours of the Digestive System.
4th Edition
International Agency for Research on Cancer: Lyon 2010



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Urinary system: Renal pelvis, ureter, bladder, urethra
ICD-O-3 topography code: C65-C68





Region of the ampulla of Vater
ICD-O-3 topography code: C24.1

Villous adenomas are usually more sessile than tubular adenomas. The neoplastic cells in villous adenomas line variably long simple or branching papillae that are more exuberant than the normal villi of the duodenal mucosa. Villous adenomas are more likely to have high grade dysplasia or an associated invasive carcinoma than tubular adenomas
2
 
Bosman FT, Carneiro F, Hruban RH, Theise ND (Eds.)
WHO Classification of Tumours of the Digestive System.
4th Edition
International Agency for Research on Cancer: Lyon 2010



.



Small intestine
ICD-O-3 topography code: C17

Villous adenomas are usually more sessile than tubular adenomas. The neoplastic cells in villous adenomas line variably long simple or branching papillae that are more exuberant than the normal villi of the duodenal mucosa. Villous adenomas are more likely to have high grade dysplasia or an associated invasive carcinoma than tubular adenomas
3
 
Bosman FT, Carneiro F, Hruban RH, Theise ND (Eds.)
WHO Classification of Tumours of the Digestive System.
4th Edition
International Agency for Research on Cancer: Lyon 2010



.



Vagina
ICD-O-3 topography code: C52