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The histopathology results revealed the unusual association of a major duodenal papilla adenomyoma and an adenomyomatous hyperplasia of the minor papilla. Because of their resemblance to pancreatic malignancy, the diagnosis of these lesions is particularly challenging. In most cases, it is established postoperatively, after histopathological examination of the surgical specimen.<\/jats:p>","DOI":"10.1177\/1066896918767561","type":"journal-article","created":{"date-parts":[[2018,4,5]],"date-time":"2018-04-05T01:05:03Z","timestamp":1522890303000},"page":"644-648","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":8,"title":["Combination of Adenomyoma and Adenomyomatous Hyperplasia of the Ampullary System: A First Case Report"],"prefix":"10.1177","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7557-7953","authenticated-orcid":false,"given":"Eleftherios","family":"Gialamas","sequence":"first","affiliation":[{"name":"Division of Abdominal Surgery, Department of Surgery, Geneva University Hospitals, Geneva, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Murielle","family":"Mormont","sequence":"additional","affiliation":[{"name":"Division of 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