Osteoblastoma/Osteogenic fibroma/Giant osteoid osteoma

Osteoblastoma/Osteogenic fibroma/Giant osteoid osteoma:
Rare rapidly growing benign lesion. 1% of all benign bone tumours. Resembles osteoid osteoma, but larger than 2cm. Occurs in older adolescents and young adults. M>F. Pain not always at night or relived by aspirin. Less bony reaction than osteoid osteoma. Most common bones are spine, skull and diaphysis of long bones.
25% have soft tissue mass.
Foot involvement is common.
X-ray – well-circumscribed radiolucent area surrounded by thin margin of reactive bone

Management:
Excision; chemotherapy; radiation therapy

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