Osteiod Osteoma

Benign bone-forming tumors that typically occur in children

Aetiology

  • Most commonly occur in adolescence
  • Common sites include the proximal femur, the diaphysis of long bones and the vertebrae

Clinical presentation

  • Intense constant pain, worse at night due to the intense inflammatory response
  • Pain is greatly relieved by NSAIDs

Investigations

  • The lesion may be seen on x-ray however bone scan (intense local uptake) and CT can confirm the diagnosis
  • CT: Small nidus of immature (woven) bone surrounded by an intense sclerotic halo (osteoblastic rim)
notion image

Management

  • The lesion may resolve spontaneously over time but some cases may require CT guided radiofrequency ablation or en bloc excision