PMC5820885_01
Magnetic resonance imaging showing a well-defined, enhancing lesion 9 mm in diameter at left posterior epidural space at D8 location displacing and compressing the cord
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F1
Magnetic resonance imaging (MRI) of dorsal spine with whole spine screening (plain and contrast) was performed, which showed a well-defined enhancing mass lesion 9 mm in diameter in the left posterior epidural space at the D8 level [Figure 1].
Multiple sections showing tumor comprising of papillae lined by cuboidal to columnar epithelium with a central fibrovascular core. Mild nuclear pleomorphism can be appreciated. Focal areas of fibrin seen. (a) H and E, x100; (b-d) H and E, x400
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F2
On histopathology, sections showed bands of fibrocollagenous tissue and a tumor composed of papillae lined by cuboidal to columnar epithelium with a central fibrovascular core with mild nuclear pleomorphism [Figure 2].
Tumor cells showing positivity for vimentin, cytokeratins, fibrillary acidic protein and S-100 protein immunohistochemical stains
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F3
The MIB-1 labeling index was approximately 7-10% [Figures 3 and 4].
Tumor cells show positivity for synaptophysin, negativity for epithelial membrane antigen and chromogranin immunohistochemical stains. MIB-1 labeling index approximately 7-10%
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F4
The MIB-1 labeling index was approximately 7-10% [Figures 3 and 4].