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. 2020 Jan 16;14(1):59–69. doi: 10.1007/s12105-019-01098-y

Fig. 3.

Fig. 3

ALES demonstrates the membranous reactivity for CD99 (a, 20x) and nuclear positivity for NKX2.2 (b, 20x) characteristic of Ewing sarcoma. However, it is defined by their unique complex epithelial differentiation, with concomitant positivity for pancytokeratin (c, 20x) and p40 (d, 20x)