Primary nonkeratinizing squamous cell carcinoma of the scapular bone: A case report

Figure 3 Histological findings. A: Histopathological examination of the biopsy specimen shows malignant tumor cells in the trabecular bone space but no typical keratin pearls (hematoxylin and eosin stain; original magnification, 100 ×); B-D: Immunohistochemical labeling reveals that the tumor cells are reactive to cytokeratin 5/6, p63, and p40 (original magnification, 40 ×).