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WHO Classification of Tumours
Intestinal-type adenoma
Region of the ampulla of Vater


Definition

Intestinal-type adenomas are the most common preinvasive neoplastic lesions of the ampulla of Vater. Intestinal-type adenomas are benign epithelial neoplasms exhibiting histological patterns/subtypes that resemble adenomas of the small and large intestines
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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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> Histological subtypes
Tubular adenoma
Villous adenoma
Tubulovillous adenoma