Osteochondroma

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  • cartilage capped exostosis
  • most common benign tumour of bone
  • usual site is metaphysis of long bones
  • lesion may be 
    • single 
    • multiple
      • hereditary multiple exostoses

Presentation

  • lump discovered accidentally
  • bony hard
  • non-tender

Investigation

  • X-ray
    • well defined swelling
    • Looks smaller than it feels because of invisible cartilaginous cap
 

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