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. 2018 Jan-Feb;93(1):154–155. doi: 10.1590/abd1806-4841.20186613

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This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivative License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium provided the original work is properly cited and the work is not changed in any way.

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A: Intense proliferation of pleomorphic cells in the dermis (Hematoxylin & eosin, X200); B: Infiltration of adipose tissue with neovascularization (Hematoxylin & eosin, X100); C: Fusiform and polygonal pleomorphic multinucleated cells with hyperchromasia of the nucleoli and mitotic figures (Hematoxylin & eosin, X400); D: Immunohistochemistry 90% highly positive for Ki-67 antibody, a cell proliferation marker, CD-68; E: A macrophage marker (IHC, X200); and F: Vimentin, a mesenchymal cell marker, IHC X100).