{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,18]],"date-time":"2026-07-18T05:03:13Z","timestamp":1784350993979,"version":"3.55.0"},"reference-count":30,"publisher":"Oxford University Press (OUP)","issue":"3","content-domain":{"domain":["eje.bioscientifica.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2013,9]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>It is difficult to diagnose anaplastic thyroid carcinoma (ATC) in a fine-needle aspiration (FNA) sample because, given the loss of morphological and immunophenotypical follicular thyroid features, its cytology resembles that of other undifferentiated neoplasms. Recent studies have shown that immunostaining for paired box gene 8 (<jats:italic>PAX8<\/jats:italic>), a transcription factor expressed in normal thyroid, is effective for diagnosing ATCs on histology. The aim of this study was to evaluate whether PAX8 could be used to identify ATCs on cytology also.<\/jats:p><\/jats:sec><jats:sec><jats:title>Design and methods<\/jats:title><jats:p>We selected three PAX8-immunostained undifferentiated FNA samples previously diagnosed as suspected ATCs, whose cell block had been negative for the expression of TGB and thyroid transcription factor-1. Matched histological samples, available in two cases, were also processed for PAX8 immunohistochemistry.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>All three FNA samples were PAX8 positive. Two samples that had an epithelioid pattern showed a diffuse, intense nuclear signal. The third sample, which had a spindle-cell pattern, showed less intense and more patchy staining. Matched histology yielded overlapping results.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>PAX8 immunocytochemistry can help cytopathologists to diagnose ATCs.<\/jats:p><\/jats:sec>","DOI":"10.1530\/eje-13-0150","type":"journal-article","created":{"date-parts":[[2013,6,29]],"date-time":"2013-06-29T07:09:37Z","timestamp":1372489777000},"page":"307-311","update-policy":"https:\/\/doi.org\/10.1530\/crossmarkpolicy-1","source":"Crossref","is-referenced-by-count":18,"title":["PAX8 is expressed in anaplastic thyroid carcinoma diagnosed by fine-needle aspiration: a study of three cases with histological correlates"],"prefix":"10.1093","volume":"169","author":[{"given":"Claudio","family":"Bellevicine","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antonino","family":"Iaccarino","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Umberto","family":"Malapelle","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ferdinando Carlo","family":"Sasso","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bernardette","family":"Biondi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Giancarlo","family":"Troncone","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","reference":[{"issue":"12","key":"2_40128355","doi-asserted-by":"crossref","first-page":"1873","DOI":"10.1016\/j.humpath.2011.02.004","volume":"42","author":"Bishop","year":"2011","journal-title":"Human pathology","ISSN":"https:\/\/id.crossref.org\/issn\/0046-8177","issn-type":"print"},{"key":"3_46238743","first-page":"600","volume":"23","year":"2012","journal-title":"Thyroid : official journal of the American Thyroid Association","ISSN":"https:\/\/id.crossref.org\/issn\/1050-7256","issn-type":"print"},{"issue":"2","key":"4_41467105","doi-asserted-by":"publisher","first-page":"985","DOI":"10.1210\/en.2011-1519","volume":"153","year":"2012","journal-title":"Endocrinology","ISSN":"https:\/\/id.crossref.org\/issn\/0013-7227","issn-type":"print"},{"key":"5_46238744","doi-asserted-by":"crossref","first-page":"684","DOI":"10.1056\/NEJMc1215697","volume":"368","year":"2013","journal-title":"New England Journal of Medicine","ISSN":"https:\/\/id.crossref.org\/issn\/0028-4793","issn-type":"print"},{"issue":"5","key":"6_16434369","doi-asserted-by":"crossref","first-page":"953","DOI":"10.1159\/000334007","volume":"40","author":"Us-Krasovec","year":"1996","journal-title":"Acta cytologica","ISSN":"https:\/\/id.crossref.org\/issn\/0001-5547","issn-type":"print"},{"issue":"4","key":"7_15543458","doi-asserted-by":"publisher","first-page":"337","DOI":"10.1136\/jcp.47.4.337","volume":"47","author":"Matias-Guiu","year":"1994","journal-title":"Journal of Clinical Pathology","ISSN":"https:\/\/id.crossref.org\/issn\/0021-9746","issn-type":"print"},{"issue":"4","key":"8_19395014","doi-asserted-by":"publisher","first-page":"464","DOI":"10.1038\/sj.bjc.6602721","volume":"93","author":"Pallante","year":"2005","journal-title":"British Journal of Cancer","ISSN":"https:\/\/id.crossref.org\/issn\/1532-1827","issn-type":"print"},{"issue":"8","key":"9_11277706","doi-asserted-by":"publisher","first-page":"3962","DOI":"10.1210\/jc.86.8.3962","volume":"86","author":"Congdon","year":"2001","journal-title":"Journal of Clinical Endocrinology &amp; 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