PMC4352627_01
Computed tomography scan of brain (plain and contrast)
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F1
CT was done, which now showed an ill-defined intraaxial mass lesion measuring 6 cm x 5 cm x 4.2 cm in the right parasagittal frontal region extending beyond midline into left side with significant perilesional edema. Contrast revealed peripheral nonuniform ring enhancement with areas of heterogeneity and significant mass effect on corpus callosum [Figure 1].
Round to polygonal tumor cells in diffuse sheets papillae (H and E, x200)
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F2
The cells exhibited prominent nucleoli and brown pigment in the cytoplasm [Figures 2 and 3].
Cells showing positivity for (a) DOPA; (b) HMB-45; (c) S-100; (d) Vimentin
AJNS-10-39-g003.jpg
PMC4352627_01_AJNS-10-39-g003.jpg
F3
The cells exhibited prominent nucleoli and brown pigment in the cytoplasm [Figures 2 and 3].