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Figure 3: (a) The cells lining the leptomeninges. (b) The cells are small round with vesicular nuclei H and E x400. (c) Immunohistochemical positivity for CD 99. HRP Polymer CD 99; 400. (d) FISH with EWS-FLI break apart probe showing the positive breakapart signals. (Arrowheads)

Figure 3: (a) The cells lining the leptomeninges. (b) The cells are small round with vesicular nuclei H and E x400. (c) Immunohistochemical positivity for CD 99. HRP Polymer CD 99; 400. (d) FISH with EWS-FLI break apart probe showing the positive breakapart signals. (Arrowheads)