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. 2023 Feb 9;13:1100398. doi: 10.3389/fonc.2023.1100398

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Copyright © 2023 Li, Chen, Nie and Wu

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Histopathological examination. (A) Fascicles of spindle cells with reduced dermal thickness by about half on low-power view, HE ×40; (B) Monomorphic spindle cells with bland cytoplasm and scattered dendritic cells containing abundant melanin, HE ×200; (C) Immunohistochemistry showed CD34⁺ cells infiltrating into subcutis and forming honeycomb-like pattern, ×40; (D) Immunohistochemistry showed spindle cells were negative for S-100, in contrast, melanin-bearing dendritic cells were positive for S-100, ×100.