PMC6334347_01
Computed tomography (CT) scan showing a mass causing an opacification of the right nasal cavity, ethmoid and maxillary sinuses.
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On radiological evaluation, CT scan revealed an opacification of the right nasal cavity, maxillary, ethmoidal, sphenoid, and frontal sinuses with bone remodeling of the septum to the left side (Figure 1).
Microscopic analysis showing sheets of small round blue cells.
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Histopathological analysis showed a small blue cell tumor (Figure 2).
Immunohistochemistry of tumour sample showing CD99 positivity.
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Immunohistochemistry showed the neoplastic cells are positive for CD99 marker (Figure 3).