case_images: PMC1796851_01
case_images: MRI scan showing a large bifrontal hyperintense mass with central necrosis.
case_images: 1746-1596-2-3-1.jpg
case_images: PMC1796851_01_1746-1596-2-3-1.jpg
case_images: F1
case_images: T1-weighted image, occupying the anterior cranial compartment [Fig 1]. The tumor was compressing the frontal horns of lateral ventricles along with anterior part of corpus callosum.
case_images: Cut-section of the tumor showing grayish-white irregular and friable surface.
case_images: 1746-1596-2-3-2.jpg
case_images: PMC1796851_01_1746-1596-2-3-2.jpg
case_images: F2
case_images: Gross examination of the resected tumor showed a 10 x 8 x 2 cm soft tissue with its cut-section showing grayish-white, irregular surface with focal necrosis [Fig 2].
case_images: Photomicrograph of the tumor showing sheets of tumor cells arranged in papillary pattern and a papilla with fibrovascular core (inset) (H&E, x200).
case_images: 1746-1596-2-3-3.jpg
case_images: PMC1796851_01_1746-1596-2-3-3.jpg
case_images: F3
case_images: Histopathological examination revealed a tumor tissue composed of sheets of cells arranged in perivascular pseudopapillary pattern [Fig 3] along with few well formed papillae with central fibrovascular core [Fig 3, inset].
case_images: Tumor cells showing immunoreactivity to (a) MIB-1 and (b) EMA (x400).
case_images: 1746-1596-2-3-4.jpg
case_images: PMC1796851_01_1746-1596-2-3-4.jpg
case_images: F4
case_images: MIB-1 labeling index was high with mean LI of 12% [Fig 4a]. Immunohistochemical positivity to epithelial membrane antigen (EMA) [Fig 4b] and vimentin was seen while Cytokeratin (CK), GFAP and S100 were non-reactive.