Fig. 5. Pathological findings of the resected tumor. (A) Hematoxylin–eosin staining revealed spindle-shaped cells with eosinophilic capsules and oblong nuclei that proliferated fascicularly and densely, and partially enlarged atypia of the nuclei of these cells (×200). Immunohistochemical staining revealed that the tumor cells were positive for (B) S100 protein, (C) H3K27me3, and (D) SOX10, and negative for (E) CD34 and (F) MIB-1 index of 5% (×200).
CD, cluster of differentiation; H3K27me3, me3 histone H3 lysine 27 trimethylation; SOX10, SRY-related HMG-BOX gene 10