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Sagittal (A, B, C) and coronal (D) post-gadolinium brain magnetic resonance imaging showing intense dural enhancement of cerebral convexities and tentorium
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(E) Axial T2-weighted brain magnetic resonance imaging that shows abnormal signal changes within right cerebellar hemisphere. (F) Post-contrast axial brain MRI shows abnormal parenchymal enhancement
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Histological examination of biopsy material. A: Highly cellular neoplasm that are composed of cells with small- to medium-sized, hyperchromatic nuclei and little apparent cytoplasm (X40). B: Low power view. C: Vague Homer-Wright rosettes. D: Positive immunohistochemistry reaction for neuron specific enolase (NSE). E: Weak positive reaction for Synaptophysin. F: Positive Glial fibrillary acidic protein (GFAP) reaction. G: Negative epithelial membrane antigen (EMA) differentiate it from meningioma which is EMA positive). H: Negative CD99
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Synaptophysin shows weak positive reaction (Figure 3A-H).