{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,28]],"date-time":"2026-07-28T19:00:25Z","timestamp":1785265225301,"version":"3.55.0"},"reference-count":23,"publisher":"The Endocrine Society","issue":"10","license":[{"start":{"date-parts":[[2022,7,29]],"date-time":"2022-07-29T00:00:00Z","timestamp":1659052800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"funder":[{"name":"Institut National de lutte contre le Cancer"},{"name":"MarMaRa Institute"},{"name":"French Ministry of Health"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2022,9,28]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:sec>\n                  <jats:title>Context<\/jats:title>\n                  <jats:p>Multiple endocrine neoplasia type 1 (MEN1) is an autosomal dominant disease caused by inactivating mutations in the MEN1 gene. In the literature, few cases of MEN1 have been reported because of mosaic MEN1 mutations.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Objective<\/jats:title>\n                  <jats:p>We performed an extensive molecular characterization in several lesions and blood samples, including plasmatic circulating cell-free DNA (ccfDNA) in an exceptional case of a patient with MEN1 mosaicism causing primary hyperparathyroidism, multiple pancreatic neuroendocrine tumors (NETs), and a metastatic thymic NET.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>Blood, ccfDNA and multiple tissue analysis were performed by next-generation sequencing.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>MEN1 mosaicism was confirmed by multiple tissue analysis. Somatic analysis of the largest pancreatic NET revealed the same MEN1 second-hit mutation as found in the thymic lesion, demonstrating its metastatic origin from the thymic lesion. Moreover, in ccfDNA we found the mosaic MEN1 mutation but also the somatic second-hit mutation found in the thymic primary tumor, revealing the presence of circulating tumor DNA (ctDNA). After surgical removal of the pancreatic metastasis, the mutated fraction of both mutations decreased, before increasing again several weeks before a new clinical relapse, suggesting that thymic ctDNA may be used as an early tumor biomarker.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusion<\/jats:title>\n                  <jats:p>This exceptional MEN1 case highlighted (1) the importance of looking for MEN1 mosaicism, (2) that MEN1 mosaicism can cause very aggressive disease, and (3) the interest in analyzing ccfDNA for confirming MEN1 mosaicism but also as a potential tumor biomarker for NET.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1210\/clinem\/dgac454","type":"journal-article","created":{"date-parts":[[2022,7,29]],"date-time":"2022-07-29T14:29:25Z","timestamp":1659104965000},"page":"e4154-e4158","source":"Crossref","is-referenced-by-count":13,"title":["Early Detection of Relapse by ctDNA Sequencing in a Patient with Metastatic Thymic Tumor and <i>MEN1<\/i> Mosaicism"],"prefix":"10.1210","volume":"107","author":[{"given":"Arnaud","family":"Lagarde","sequence":"first","affiliation":[{"name":"Aix Marseille Univ, APHM, INSERM, MMG, Hospital La Conception Laboratory of Molecular Biology , Marseille , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lauriane","family":"Le Collen","sequence":"additional","affiliation":[{"name":"Department of Endocrinology Diabetology, University of Reims , Reims , France"},{"name":"Inserm\/CNRS UMR 1283\/8199, Institut Pasteur de Lille , EGID, Lille , France"},{"name":"Department of Clinical Genetics, University of Reims , Reims , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Camille","family":"Boulagnon","sequence":"additional","affiliation":[{"name":"Biopathology Laboratory, P\u00f4le de Biologie Territorial, CHU de Reims , 51092 Reims , France"},{"name":"Universit\u00e9 de Reims Champagne Ardenne (URCA), CNRS , UMR 7369 MEDyC, Reims , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hedia","family":"Brixi","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Digestive Oncology, Reims University Hospital , Reims , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anne","family":"Durlach","sequence":"additional","affiliation":[{"name":"Biopathology Laboratory, P\u00f4le de Biologie Territorial, CHU de Reims , 51092 Reims , France"},{"name":"Inserm UMR-S 1250 , 51092 Reims , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gr\u00e9gory","family":"Mougel","sequence":"additional","affiliation":[{"name":"Aix Marseille Univ, APHM, INSERM, MMG, Hospital La Conception Laboratory of Molecular Biology , Marseille , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8440-0030","authenticated-orcid":false,"given":"Thomas","family":"Cuny","sequence":"additional","affiliation":[{"name":"Aix Marseille Univ, APHM, INSERM, MMG, Hospital La Conception Department of endocrinology , Marseille , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4320-2601","authenticated-orcid":false,"given":"Brigitte","family":"Delemer","sequence":"additional","affiliation":[{"name":"Department of Endocrinology Diabetology, University of Reims , Reims , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anne","family":"Barlier","sequence":"additional","affiliation":[{"name":"Aix Marseille Univ, APHM, INSERM, MMG, Hospital La Conception Laboratory of Molecular Biology , Marseille , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1775-9569","authenticated-orcid":false,"given":"Pauline","family":"Romanet","sequence":"additional","affiliation":[{"name":"Aix Marseille Univ, APHM, INSERM, MMG, Hospital La Conception Laboratory of Molecular Biology , Marseille , France"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"80","published-online":{"date-parts":[[2022,7,29]]},"reference":[{"issue":"5311","key":"2022092808395687000_CIT0001","doi-asserted-by":"crossref","first-page":"404","DOI":"10.1126\/science.276.5311.404","article-title":"Positional cloning of the gene for multiple endocrine neoplasia-type 1","volume":"276","author":"Chandrasekharappa","year":"1997","journal-title":"Science"},{"issue":"3","key":"2022092808395687000_CIT0002","doi-asserted-by":"crossref","first-page":"363","DOI":"10.1016\/0002-9343(54)90353-8","article-title":"Genetic aspects of adenomatosis of endocrine glands","volume":"16","author":"Wermer","year":"1954","journal-title":"Am J Med."},{"issue":"2","key":"2022092808395687000_CIT0003","doi-asserted-by":"crossref","first-page":"249","DOI":"10.1007\/s00268-009-0290-1","article-title":"Risk factors and causes of death in MEN1 disease. 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