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. 2021 Aug 23;13(3):342–346. doi: 10.4274/jcrpe.galenos.2020.2020.0051

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©Copyright 2021 by Turkish Pediatric Endocrinology and Diabetes Society | The Journal of Clinical Research in Pediatric Endocrinology published by Galenos Publishing House.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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(A) Large areas of amyloid deposits (black triangle) can be seen around and between tumor cells and thyroid follicules (Hematoxylin and eosin x100), (B) Large deposits of amyloid (black triangle) in thyroid parenchyma (Congo Red x100), (C) Tumor cells showed positive immunoreactivity against monoclonal carcinoembryonic antigen (CEA) antibodies (CEA x200), (D) Tumor cells showed positive immunoreactivity against monoclonal calcitonin antibodies (Calcitonine x100), (E) Tumor cells showed positive immunoreactivity against monoclonal chromogranin antibodies (Chromogranin x200), (F) Tumor cells showed positive immunoreactivity against monoclonal TTF-1 antibodies (TTF-1 x100)