PMC8131137_01
Image of lesion at 1 month (a) and image of lesion at 6 months (b). The mass showed progressive enlargement in size with surface ulcerations.
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fig1
Contrast-enhanced CT demonstrating right parietal vividly enhancing scalp lesion without involvement of the skull (a). Contrast-enhanced MRI also showing vivid enhancement (b).
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fig2
The gross findings showing a skin-covered polypoid firm mass (a) with solid tan-white cut surface (b).
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fig3
On sectioning, the cut surface showed solid tan-white appearance as shown in Figures 3(a) and 3(b).
H&E microscopic findings. (a) A low-power view of sheets of polygonal cells with variably fibromyxoid stroma. (b) A high-power view showing the classic rhabdoid profile, comprising abundant cytoplasm with eosinophilic hyaline globules and vesicular nuclei with prominent nucleoli.
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fig4
The background stroma is fibromyxoid with high mitotic activity in addition to areas of necrosis as shown in Figures 4(a) and 4(b).
Immunohistochemical findings. (a) EMA showing strong positivity in the tumor cells. (b) Loss of nuclear INI-1 staining in the tumor cells with positive internal control (endothelial cells).
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fig5
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