Figure 2. Photomicrographs.

a) Ossicles of bone within a cellular fibrous connective tissue stroma - ossifying fibroma (10x, H&E)

b) Bony trabeculae in Chinese letter pattern - fibrous dysplasia (10x, H&E)

c) Cellular connective tissue with bone elements and vascular channels - cherubism (4x, H&E)

d) Sheets of malignant cells with areas of hemorrhage - osteosarcoma (40x, H&E)

e) Diffuse proliferation of malignant cells - osteosarcoma (40x, H&E)

f) Islands of malignant epithelial cells invading the bone - squamous cell carcinoma invading the bone (10x, H&E)