{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,9]],"date-time":"2026-07-09T17:27:29Z","timestamp":1783618049868,"version":"3.55.0"},"reference-count":11,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2025,5,30]],"date-time":"2025-05-30T00:00:00Z","timestamp":1748563200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2025,5,30]],"date-time":"2025-05-30T00:00:00Z","timestamp":1748563200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Head &amp;amp; Neck"],"published-print":{"date-parts":[[2025,12]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Due to their shared embryologic origin, the association between ectopic parathyroid glands and the thymus is well recognized. Abnormal implantation of thymic tissue during embryological migration to the mediastinum can lead to ectopic cervical thymus.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A 33\u2010year\u2010old woman with persistent primary hyperparathyroidism (89\u2009pg\/mL) was referred following failed parathyroidectomy. Preoperative 4D computed topography identified soft tissue in the right carotid sheath corresponding to an area of increased uptake on sestamibi imaging. Revision parathyroidectomy was performed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Intraoperatively, thymic tissue and an associated parathyroid adenoma were found in the right carotid sheath extending superiorly toward the hyoid bone. Post\u2010excision parathyroid hormone levels fell within normal limits (24.2\u2009pg\/mL).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>We describe a novel location for an ectopic parathyroid adenoma within ectopic cervical thymic tissue outside of the thyroid bed and mediastinum. This highlights embryologic relationships that may aid in diagnostic and therapeutic management, particularly in revision or non\u2010localizing cases.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/hed.28176","type":"journal-article","created":{"date-parts":[[2025,5,30]],"date-time":"2025-05-30T05:35:40Z","timestamp":1748583340000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Undescended Ectopic Parathyroid Adenoma Within Ectopic Cervical Thymus in the Carotid Sheath"],"prefix":"10.1002","volume":"47","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-7344-5784","authenticated-orcid":false,"given":"Salmaan","family":"Sayeed","sequence":"first","affiliation":[{"name":"THANC (Thyroid, Head &amp; Neck Cancer) Foundation  New York New York USA"},{"name":"Department of Otolaryngology\u2013Head and Neck Surgery Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Justin","family":"Joseph","sequence":"additional","affiliation":[{"name":"THANC (Thyroid, Head &amp; Neck Cancer) Foundation  New York New York USA"},{"name":"Department of Otolaryngology\u2013Head and Neck Surgery Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9681-6052","authenticated-orcid":false,"given":"Luke","family":"Stanisce","sequence":"additional","affiliation":[{"name":"THANC (Thyroid, Head &amp; Neck Cancer) Foundation  New York New York USA"},{"name":"Department of Otolaryngology\u2013Head and Neck Surgery Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6483-5109","authenticated-orcid":false,"given":"Ricardo","family":"Ramirez","sequence":"additional","affiliation":[{"name":"THANC (Thyroid, Head &amp; Neck Cancer) Foundation  New York New York USA"},{"name":"Department of Otolaryngology\u2013Head and Neck Surgery Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Azita","family":"Khorsandi","sequence":"additional","affiliation":[{"name":"Department of Diagnostic, Molecular and Interventional Radiology Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6771-2975","authenticated-orcid":false,"given":"Margaret","family":"Brandwein\u2010Weber","sequence":"additional","affiliation":[{"name":"Department of Pathology Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6615-9247","authenticated-orcid":false,"given":"Mark L.","family":"Urken","sequence":"additional","affiliation":[{"name":"THANC (Thyroid, Head &amp; Neck Cancer) Foundation  New York New York USA"},{"name":"Department of Otolaryngology\u2013Head and Neck Surgery Icahn School of Medicine at Mount Sinai  New York New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,5,30]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.coi.2008.03.001"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1242\/dev.059998"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11357\u2010013\u20109564\u20105"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.7759\/cureus.25142"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpedsurg.2021.03.003"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1001\/archotol.128.6.714"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1136\/bcr\u20102014\u2010206634"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.1177\/1179551419869917"},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.1155\/2020\/9127635"},{"key":"e_1_2_6_11_1","doi-asserted-by":"publisher","DOI":"10.47102\/annals\u2010acadmedsg.V41N6p271"},{"key":"e_1_2_6_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijporl.2013.10.066"}],"container-title":["Head &amp; 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