Fig. 3From: Primary orbital extraskeletal osteosarcoma and review of literaturea Hematoxylin-eosin staining with low-power view showing bizarre tumor cells and osteoid with atypical mitotic figures. (hematoxylin-eosin, original magnification× 200). b High-power view of the cellular area showing malignant spindle cells with abundant neoplastic bone and cartilage formation (hematoxylin-eosin, original magnification× 400). c-d Immunohistochemical examination showing positivity of tumor cells to S-100(c) and Vimentin (d) (original magnification× 400)Back to article page