Fig. 1

Histological findings (H-E). a 20× magnification, Heterogeneous proliferation of cells in a highly vascular stroma with hemorrhagic areas, hemosiderin-laden macrophages and chronic inflammatory infiltration. b 20× magnification and c 40× magnification. Numerous osteoclast-like giant cells that vary in shape and size with an eosinophilic cytoplasm (arrows).Marked nuclear atypia: Vesicular appereance, hyperchromatic (head of arrow) or with prominent nucleolus (circle). d 40× magnification, Focus of carcinoma in situ with the same nuclear atypia