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Adenomas are the most frequent tumors of the Vater s ampulla. Their capacity for malignant transformation following the adenoma-carcinoma sequence is well known. It is because of this that resection after diagnosis is required. The identification of the appropriate technique according to tumor features would require that patients not be undertreated or overtreated, which would give rise to serious consequences derived from their location.

Transduodenal ampullectomy in the treatment of villous adenomas and adenocarcinomas of the Vater's ampulla