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. 2019 Mar 11;29(3):311–321. doi: 10.1089/thy.2018.0509

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Copyright 2019, Mary Ann Liebert, Inc., publishers

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FIG. 1. — Microscopic pictures of poorly differentiated thyroid carcinoma. (A) Solid/nested growth pattern with tumor necrosis, without nuclear features of papillary thyroid carcinoma (PTC). This tumor fulfills both the Turin and Memorial Sloan Kettering Cancer Center (MSKCC) criteria for the entity (n, tumor necrosis; 200 × ). (B) Solid/nested growth pattern with high mitotic rate (arrows indicate two mitotic figures) with nuclear features of PTC. Because of the nuclear appearance, the tumor does not satisfy the Turin criteria. However, it fulfills the MSKCC definition because of high mitotic rate (400 × ).