Figure 1

(a) Osteosarcoma (×4); (b) Giant cells with osteoid formation (×20); (c) Giant cells with osteoid formation (×20); (d) Negative immunohistochemical staining for CAM5.2 (×20); (e) Negative immunohistochemical staining for MNF116 (×20); (f) Positive immunohistochemical staining for vimentin (×20).