PMC8074827_01
Preoperative picture of scalp swelling
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F1
Examination revealed a very pale infant with a 15 cm x 15 cm nonilluminant cystic swelling over the parieto-occipital region of the scalp, more so on the left side [Figure 1].
Intraoperative picture of mass excision
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F2
Excision of the cyst in toto was done; about 10% of the tumor had solid consistency [Figure 2].
Distinctive cytoplasmic membrane staining pattern with CD99 (x600)
JIAPS-26-60-g003.jpg
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F3
The biopsy was reported as PNET/extraskeletal Ewing's sarcoma (EES); tumor cells were positive for CD99 (focally), neuron-specific enolase (NSE), and vimentin [Figure 3].