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a: Histologic sections showed subepithelial, unencapsulated but well-demarcated tumor (20xH&E). b: At higher magnification, it was seen that the tumor was composed of plump-polygonal shaped cells with large-pale granular cytoplasm and uniform small round nuclei. Note that there was no overlying pseudoepitheliomatous hyperplasia (100xH&E). c: İmmunohistochemically, the tumor cells were negative for S-100 protein unlike its adult counterpart (100xİmmunohistochemistery-S100 protein).
