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. 2021 Feb 4;32(1):63–76. doi: 10.1007/s12022-021-09665-2

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© The Author(s) 2021

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Fig. 3 — Patterns of coexistence of poorly differentiated and wel-differentiated thyroid carcinoma components. Poorly differentiated carcinoma areas with solid growth and vascular invasion at the periphery of a follicular carcinoma (a). Poorly differentiated thyroid carcinoma with solid growth and comedo necrosis associated with a papillary carcinoma with microfollicular architecture (b)