Categories
Musculoskeletal System ORGAN SYSTEMS

Osteoid osteoma

Introduction

  • M/C true benign bone tumour, 10% of all benign bone tumors
    • M/C benign tumour overall: osteochondroma
  • M/C benign tumour of carpal bones
  • M/C cause of painful scoliosis in young

Clinical features

  • Night pains (d/t prostaglandin E2)

Diagnosis

CT-scan:

  • Central nidus: Meshwork of blood vessels, osteoblasts, osteoclasts, woven bone
    • Central nidus < 2 cm (osteoid osteoma) & > 2cm (osteoblastoma)
  • Sclerosis (around central nidus): Periosteal reaction

Management

  • NSAIDs
  • Radiofrequency ablation (RFA)

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