Fig. 4
Immunohistochemical analysis of the excised tumor. A Hematoxylin and eosin staining: The lesion is microscopically composed of large polygonal cells with abundant eosinophilic granular cytoplasm and small round to oval nuclei. B S100: positive C CD68: positive; D HMB-45: negative; E neurofilament (cytology): focal positive; F ERG (cytology): negative; G Ki-67: 5%. (A, B, C, D, G: Philips digital pathology scanner; original magnification × 200, E, F: microscope; original magnification × 400)