{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,8]],"date-time":"2026-03-08T23:06:28Z","timestamp":1773011188802,"version":"3.50.1"},"reference-count":18,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,2,23]],"date-time":"2026-02-23T00:00:00Z","timestamp":1771804800000},"content-version":"vor","delay-in-days":53,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"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":["Case Reports in Endocrinology"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:p>Occult thyroid carcinoma (OTC) involves cervical lymph node metastases without primary papillary thyroid carcinoma (PTC). A 57\u2010year\u2010old man presented with a left neck mass. Ultrasonography (US) revealed a mass in the left cervical node (inferior internal jugular node, Level IV). Positron emission tomography\/computed tomography (PET\/CT) and fine needle aspiration biopsy indicated suspected PTC metastasis. The serum thyroglobulin (Tg) level was elevated. Total thyroidectomy and bilateral central neck and left cervical dissection revealed no thyroid carcinoma, while the left cervical node showed ground glass nuclei and proliferation. Our diagnosis was PTC with no primary origin, pT0N1bM0 Stage II. Due to a low risk of recurrence, we initiated thyroid\u2010stimulating hormone (TSH) suppression therapy. Tg levels remained low 4 years postoperatively with no signs of recurrence. The optimal management of OTC cases remains unclear and blood tests (Tg levels), risk of recurrence, and patient characteristics must be considered.<\/jats:p>","DOI":"10.1155\/crie\/3603326","type":"journal-article","created":{"date-parts":[[2026,3,8]],"date-time":"2026-03-08T19:19:36Z","timestamp":1772997576000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Occult Thyroid Carcinoma Localized to Three Cervical Lymph Nodes Without Primary Origin in the Thyroid Gland: A Case Report"],"prefix":"10.1155","volume":"2026","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1148-4659","authenticated-orcid":false,"given":"Daisuke","family":"Murayama","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3660-612X","authenticated-orcid":false,"given":"Yasunori","family":"Nishida","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shun","family":"Hishikawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ryosuke","family":"Hirano","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Toko","family":"Hashizume","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Koji","family":"Azuhata","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hisashi","family":"Shimojo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nobuo","family":"Ito","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-3052-6339","authenticated-orcid":false,"given":"Osamu","family":"Mishima","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2026,2,23]]},"reference":[{"key":"e_1_2_10_1_2","doi-asserted-by":"publisher","DOI":"10.1089\/thy.2011.0312"},{"key":"e_1_2_10_2_2","doi-asserted-by":"publisher","DOI":"10.1177\/0194599817722550"},{"key":"e_1_2_10_3_2","first-page":"180","article-title":"Occult Thyroid Carcinoma","volume":"10","author":"Moosa M.","year":"1997","journal-title":"The Cancer Journal"},{"key":"e_1_2_10_4_2","first-page":"296","article-title":"Occult Thyroid Carcinoma","volume":"29","author":"Boucek J.","year":"2009","journal-title":"Acta Otorhinolaryngologica Italica: Organo Ufficiale Della Societa Italiana di Otorinolaringologia e Chirurgia Cervico-Facciale"},{"key":"e_1_2_10_5_2","first-page":"5210","article-title":"Occult Thyroid Carcinoma: A Rare Case Report and Review of Literature","volume":"7","author":"Liu H.","year":"2014","journal-title":"International Journal of Clinical and Experimental Pathology"},{"key":"e_1_2_10_6_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00268-008-9614-9"},{"key":"e_1_2_10_7_2","doi-asserted-by":"publisher","DOI":"10.21037\/tcr-21-1780"},{"key":"e_1_2_10_8_2","doi-asserted-by":"publisher","DOI":"10.1507\/endocrj.45.111"},{"key":"e_1_2_10_9_2","doi-asserted-by":"publisher","DOI":"10.1007\/s10620-016-4141-2"},{"key":"e_1_2_10_10_2","doi-asserted-by":"publisher","DOI":"10.5114\/wo.2013.34613"},{"key":"e_1_2_10_11_2","doi-asserted-by":"publisher","DOI":"10.1001\/jamadermatol.2015.2235"},{"key":"e_1_2_10_12_2","doi-asserted-by":"publisher","DOI":"10.1111\/jdv.13815"},{"key":"e_1_2_10_13_2","first-page":"1103","article-title":"Management of Ectopic Thyroid Nodules","volume":"114","author":"Kozol R. 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