Pathology: osteoid osteoma

Fibrous-osseous neoplasm
Anastamosing trabeculae of woven bone with osteoblastic rimming
Polygonal cells with amphophilic cytoplasm; monomorphic ovoid nuclei with small nucleoli, minimal pleomorphism, and inconspicuous mitotic activity
Occasional thick-walled vessels; rare osteoclast-type multi-nucleated giant cells

Clinically painful with imaging showing a central lucency and oedema; treated by radiofrequency ablation

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Bone Tumours

Osteogenic Tumours