title: Adenocarcinoma of the duodenum arising in a villous adenoma.
abstract: Duodenal villous adenomas are premalignant lesions. Prior to malignant transformation, their appearance on upper gastrointestinal examination is often characteristic. Following malignant change, the final diagnosis frequently requires tissue.
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging*; D000236:Adenoma / Q000000981:diagnostic imaging*; D000368:Aged; D004379:Duodenal Neoplasms / Q000000981:diagnostic imaging*; D004386:Duodenum / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D009378:Neoplasms, Multiple Primary / Q000000981:diagnostic imaging*; D011859:Radiography