Osteoiod osteoma

Osteoid osteoma
Updated: 08/29/2024
© Jun Wang, MD, PhD

General features
  • Benign
  • Usually < 1.5 cm
  • More common in male, 5-24 years old
  • Limited growth
Most common sites:
  • Long bones, especially femur and tibia
Clinical presentations
  • Pain, worse at night, relieved by NSAIDs
Key pathogenesis
  • Pain associated with prostaglandin E2 or nerves in reactive zone
Key radiological findings
  • Radiolucent nidus with surrounding bony sclerosis and cortical thickening
  • No invasion
Key morphological features
  • Anastomosing osteoid trabeculae and woven bone rimmed by osteoblasts
  • No invasion
  • No atypia
Treatment
  • NSAIDs and other medical managements
  • Excision
  • Radiofrequency ablation

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