PMC8138253_01
MRI showing the right cerebellum space-occupying lesion on T1-weight image.
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F1
A brain magnetic resonance imaging (MRI) scan revealed a 5.1 x 4.1 x 2.6 cm homogeneous mass located in the right cerebellum (Fig. 1).
Tumor cells showing diffuse immunohistochemical positivity for CD-99.
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F2
Postoperative pathological report suggested a malignant solitary fibrous tumor, the tumor cells were positive for Vimentin, CD99 (Fig. 2), bcl-2 (Fig. 3) and CD34 (Fig. 4), EMA, S100 and GFAP were negative.
Tumor cells showing diffuse immunohistochemical positivity for CD-34.
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F4
Postoperative pathological report suggested a malignant solitary fibrous tumor, the tumor cells were positive for Vimentin, CD99 (Fig. 2), bcl-2 (Fig. 3) and CD34 (Fig. 4), EMA, S100 and GFAP were negative.
Ki-67 immunostaining showed a 30% proliferative index.
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F5
Ki-67 immunostaining showed a 30% proliferative index (Fig. 5).
Histological examination showed that the tumor was composed of spindle cells (H&E staining).
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F6
Histological examination showed that the tumor was composed of spindle cells (Fig. 6).
MRI showed that the tumor was completely removed.
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F7
Three months after the operation, MRI showed that the tumor was completely removed and no recurrence was found (Fig. 7).