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In this article, we report a rare case of pure endocrine pancreatic heterotopia involving a Meckel\u2019s diverticulum, a potential mimic of a well-differentiated neuroendocrine tumor. Several features were useful in making the distinction, including lack of desmoplasia and mass forming lesion, and immunohistochemical staining in a physiological pattern similar to that of islets of Langerhans. It is important for pathologists to be aware of this entity and its features to avoid misdiagnosis of a neuroendocrine tumor.<\/jats:p>","DOI":"10.1177\/1066896920934009","type":"journal-article","created":{"date-parts":[[2020,6,15]],"date-time":"2020-06-15T01:59:49Z","timestamp":1592186389000},"page":"174-178","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Pancreatic Endocrine Heterotopia Involving Meckel\u2019s Diverticulum: A Potential Mimic of Neuroendocrine Tumor"],"prefix":"10.1177","volume":"29","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7830-2525","authenticated-orcid":false,"given":"Daniel J.","family":"Rowan","sequence":"first","affiliation":[{"name":"Department of Laboratory Medicine and Pathology, Division of Anatomic Pathology, Mayo Clinic, Rochester, MN, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lizhi","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Laboratory Medicine and Pathology, Division of Anatomic Pathology, Mayo Clinic, Rochester, MN, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Valentina","family":"Logunova","sequence":"additional","affiliation":[{"name":"Department of Laboratory Medicine and Pathology, Division of Anatomic Pathology, Mayo Clinic, Rochester, MN, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2020,6,14]]},"reference":[{"key":"bibr1-1066896920934009","doi-asserted-by":"publisher","DOI":"10.1001\/archsurg.1974.01360060032010"},{"key":"bibr2-1066896920934009","doi-asserted-by":"publisher","DOI":"10.1097\/MD.0000000000012154"},{"key":"bibr3-1066896920934009","doi-asserted-by":"publisher","DOI":"10.1177\/014107680609901011"},{"key":"bibr4-1066896920934009","doi-asserted-by":"publisher","DOI":"10.1097\/00000658-199410000-00014"},{"key":"bibr5-1066896920934009","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9610(76)90043-X"},{"key":"bibr6-1066896920934009","doi-asserted-by":"publisher","DOI":"10.1016\/S1072-7515(01)00817-1"},{"key":"bibr7-1066896920934009","first-page":"255","volume":"39","author":"Gaspar Fuentes A","year":"1973","journal-title":"Rev Esp Enferm Apar Dig"},{"key":"bibr8-1066896920934009","doi-asserted-by":"publisher","DOI":"10.1177\/2050640617752771"},{"key":"bibr9-1066896920934009","doi-asserted-by":"publisher","DOI":"10.1007\/s11605-013-2191-8"},{"key":"bibr10-1066896920934009","doi-asserted-by":"publisher","DOI":"10.1007\/s11605-018-04096-7"},{"key":"bibr11-1066896920934009","doi-asserted-by":"publisher","DOI":"10.1080\/00313020600924559"},{"key":"bibr12-1066896920934009","first-page":"83","volume":"35","author":"Parsons S","year":"2003","journal-title":"Pathology"},{"key":"bibr13-1066896920934009","doi-asserted-by":"publisher","DOI":"10.5858\/2002-126-0464-GEPH"},{"key":"bibr14-1066896920934009","volume-title":"Stevens & Lowe\u2019s Human Histology","author":"Lowe JS","year":"2015","edition":"4"},{"key":"bibr15-1066896920934009","doi-asserted-by":"publisher","DOI":"10.1093\/ajcp\/91.1.52"},{"key":"bibr16-1066896920934009","doi-asserted-by":"publisher","DOI":"10.1186\/1477-7819-7-54"},{"key":"bibr17-1066896920934009","doi-asserted-by":"publisher","DOI":"10.1016\/S0016-5107(97)70069-5"},{"key":"bibr18-1066896920934009","doi-asserted-by":"publisher","DOI":"10.1136\/jcp.2003.013557"},{"key":"bibr19-1066896920934009","doi-asserted-by":"publisher","DOI":"10.1097\/PAS.0b013e31806841e1"}],"container-title":["International Journal of Surgical Pathology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/1066896920934009","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/1066896920934009","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/1066896920934009","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T10:21:24Z","timestamp":1777458084000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/1066896920934009"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,6,14]]},"references-count":19,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2021,4]]}},"alternative-id":["10.1177\/1066896920934009"],"URL":"https:\/\/doi.org\/10.1177\/1066896920934009","relation":{},"ISSN":["1066-8969","1940-2465"],"issn-type":[{"value":"1066-8969","type":"print"},{"value":"1940-2465","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,6,14]]}}}