PMC3162849_01
An expansile, lytic mass involving right zygoma and lateral wall of right orbit (Contrast enhancing computed tomography)
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F1
It had resulted in cortical thinning with discontinuity of the cortex at multiple sites [Figure 1].
Cytological smear showing pleomorphic round cells with pleomorphic nuclei and scanty cytoplasm (PAP stain, 1000x)
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F2
Cells showed scanty amount of cytoplasm with nuclear pleomorphism [Figure 2].
Round blue tumor cells infi ltrating the peripheral tissue with few infl ammatory cells. A bony spicule is seen on the top left side (H and E, 40x)
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F3
The nuclei were large, vesicular, and almost occupying the cell [Figure 3].
Small sheets of round blue tumor cells with thin connective tissue septa and capillaries in between (H and E, 100x)
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F4
Thin connective tissue septa with capillaries were seen in between sheets of round cells [Figure 4].
High power field demonstrates pleomorphic round cells with large vesicular nuclei and scanty cytoplasm (H and E, 400x)
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F5
The section of the peripheral tumor tissue showed connective tissue with few inflammatory cells, some bony spicules, infiltrated by small, round neoplastic cells [Figure 5].
Round cells showing immunopositivity for vimentin (IHC, 400x)
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F6
The neoplastic cells were immunopositive for vimentin and MIC-2 [Figure 6, Figure 7].
Immunohistochemical expression of MIC-2 in cytoplasm of tumor cells (IHC, MIC-2 400x)
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F7
The neoplastic cells were immunopositive for vimentin and MIC-2 [Figure 6, Figure 7].