A Case of Buccal Clear Cell Carcinoma Caused by Rare Fusion Gene: EWSR1-CREM

Figure 4

Immunohistochemical findings: (a) pancytokeratin (AE1/AE3), (b) p63, (c) S100, and (d) Ki-67. The tumor cells were stained intensely with cytokeratins, but not myoepithelial markers. The nuclei of the clear cells were positive for p63. Ki-67-positive cells were rarely found in the tumor nests ((a–d) original magnification ×200).

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(b)

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(d)