case_images: PMC10858751_01
case_images: (a) MRI axial post gadolinium axial T1 weighted image. The tumor was a large well circumscribed, dura based, extra-axial mass in the left aspect of the posterior fossa. (b) The mass is predominantly hypointense on T1 weighted image. (c) The mass lesion showed marked hyperintensity on T2 weighted images. (d) Remodeling and scalloping of the inner table of the occipital bone was also seen.
case_images: SNI-15-14-g001.jpg
case_images: PMC10858751_01_SNI-15-14-g001.jpg
case_images: F1
case_images: Magnetic resonance imaging (MRI) revealed a large, well-circumscribed mass centered within the left cerebellar hemisphere, with apparent exophytic extension through the posterolateral cortical margin and suggested adherence to the overlying endosteal dural layer [Figure 1].
case_images: (a) Myxoid tumor with spindle cells. (Hematoxylin and eosin, original magnification x 200). (b) Epithelial membrane (EMA) immunohistochemistry. No brown EMA immunoreactivity was detected in spindle cells. (Hematoxylin counterstain and diaminobenzidine chromogen (brown); original magnification x 200). (c) Vimentin immunohistochemistry. Tumor cells displayed extensive vimentin immunoreactivity (brown). (Hematoxylin counterstain and diaminobenzidine; original magnification x 200). (d) Ki-67 immunohistochemistry. Ki-67 labeling (brown) was variable (Hematoxylin counterstain and diaminobenzidine; original magnification x 200).
case_images: SNI-15-14-g002.jpg
case_images: PMC10858751_01_SNI-15-14-g002.jpg
case_images: F2
case_images: CD1a, or CD117 immunoreactivity was seen. CD68 and CD163 highlighted macrophages [Figure 2].