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Update on the cytologic features of papillary thyroid carcinoma variants

Auger, Manon
Published in Diagnostic Cytopathology. 2017, vol. 45, no. 8, p. 714-730
Abstract Papillary thyroid cancer (PTC), which accounts for 85-90% of all thyroid cancers, is generally an indolent tumor with long term survival rates >95%. A reliable definitive diagnosis of PTC is usually straightforward in fine needle aspirates of conventional PTC whenever the characteristic papillary and/or flat honeycomb sheet-like architecture and the typical nuclear features of chromatin pallor, nuclear enlargement, crowding, grooves and pseudoinclusions are encountered. Conventional PTC, however, has diminished in relative frequency as compared to PTC variants, especially the noninvasive follicular variant of PTC, an indolent tumor which has recently been reclassified as "noninvasive follicular thyroid neoplasm with papillary-like nuclear features" (NIFTP). These PTC variants are characterized by various architecture, cell type and shape, and stromal features, some of which can be recognized cytologically. Awareness of the cytomorphological spectrum and of the characteristic cytological features of these PTC variants is important to avoid diagnostic pitfalls. In this article, we review the different variants of PTC, including their cytomorphologic features, differential diagnosis, and salient molecular features. Diagn. Cytopathol. 2017. © 2017 Wiley Periodicals, Inc.
PMID: 28262004
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PUSZTASZERI, Marc, AUGER, Manon. Update on the cytologic features of papillary thyroid carcinoma variants. In: Diagnostic Cytopathology, 2017, vol. 45, n° 8, p. 714-730. https://archive-ouverte.unige.ch/unige:94224

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Deposited on : 2017-05-12

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