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. 2019 Jan 11;98(2):e14102. doi: 10.1097/MD.0000000000014102

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Copyright © 2019 the Author(s). Published by Wolters Kluwer Health, Inc.

This is an open access article distributed under the terms of the Creative Commons Attribution-Non Commercial License 4.0 (CCBY-NC), where it is permissible to download, share, remix, transform, and buildup the work provided it is properly cited. The work cannot be used commercially without permission from the journal. http://creativecommons.org/licenses/by-nc/4.0

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Histopathological features. Histopathologically, the highly cellular tumor exhibits pseudopapillary structures with non-hyalinized central capillaries (A and B; hematoxylin and eosin [H&E], magnification ×40 [A] and ×100 [B]). Non-hyalinized vascular cores (vc) surrounded by both fibrillary (fib) and mini-gemistocytic (gem) neoplastic cells; these pseudopapillary structures are covered by naked neoplastic cells (nkd) (C; H&E, magnification ×400). Focal microvascular proliferation is also observed (D; H&E, magnification ×200).