Tall cell papillary thyroid carcinoma: new diagnostic criteria and mutations in BRAF and TERT
<section class="abstract"><p>The tall cell (TC) variant of papillary thyroid carcinoma (PTC) has an unfavorable prognosis. The diagnostic criteria remain inconsistent, and the role of a minor TC component is unclear. Molecular diagnostic markers are not available; however, ther...
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| Main Authors: | , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
Jun 2015
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| In: |
Endocrine related cancer
Year: 2015, Volume: 22, Issue: 3, Pages: 419-429 |
| ISSN: | 1479-6821 |
| DOI: | 10.1530/ERC-15-0057 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1530/ERC-15-0057 Verlag, lizenzpflichtig, Volltext: https://erc.bioscientifica.com/view/journals/erc/22/3/419.xml 
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| Author Notes: | Matthias S. Dettmer, Anja Schmitt, Hans Steinert, David Capper, Holger Moch, Paul Komminoth and Aurel Perren |
| Summary: | <section class="abstract"><p>The tall cell (TC) variant of papillary thyroid carcinoma (PTC) has an unfavorable prognosis. The diagnostic criteria remain inconsistent, and the role of a minor TC component is unclear. Molecular diagnostic markers are not available; however, there are two potential candidates: <em>BRAF V600E</em> and telomerase reverse transcriptase (<em>T</em><em>ERT</em>) promoter mutations. Using a novel approach, we enriched a collective with PTCs that harbored an adverse outcome, which overcame the limited statistical power of most studies. This enabled us to review 125 PTC patients, 57 of which had an adverse outcome. The proportion of TCs that constituted a poor prognosis was assessed. All of the tumors underwent sequencing for <em>TERT</em> promoter and <em>BRAF</em> <em>V600E</em> mutational status and were stained with an antibody to detect the <em>BRAF</em> <em>V600E</em> mutation. A 10% cutoff for TCs was significantly associated with advanced tumor stage and lymph node metastasis. Multivariate analysis showed that TCs above 10% were the only significant factor for overall, tumor-specific, and relapse-free survival. Seven percent of the cases had a <em>TERT</em> promoter mutation, whereas 61% demonstrated a <em>BRAF</em> mutation. The presence of TC was significantly associated with <em>TERT</em> promoter and <em>BRAF </em>mutations. <em>TERT</em> predicted highly significant tumor relapse (<em>P</em><0.001). PTCs comprised of at least 10% TCs are associated with an adverse clinical outcome and should be reported accordingly. <em>BRAF</em> did not influence patient outcome. Nevertheless, a positive status should encourage the search for TCs. <em>TERT</em> promoter mutations are a strong predictor of tumor relapse, but their role as a surrogate marker for TCs is limited.</p></section> |
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| Item Description: | Gesehen am 14.01.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1479-6821 |
| DOI: | 10.1530/ERC-15-0057 |