Fig. 2

Histopathology of the tumour specimen. The vitreum is on the right of a. Islands of tumour tissue were detected in the retro-orbital space. The tumour contained skin and skin appendages (1), vascular tissue cells (2), fatty tissue (3), and differentiated mature glands (4). Strong, diffuse membrane immunohistochemical staining for CK indicated skin and skin appendages (b) and immunostaining for vimentin confirmed differentiated mature glands (c). The Ki-67 nuclear staining index was approximately 10% (d). Scale bars: Fig. a, 4 mm; Fig. a1–a4, 100 μm; b, c, d, 20 μm