Osteochondroma malignant transformation (mnemonic)

Last revised by Owen Kang on 26 Apr 2020

A useful mnemonic for listing the radiological and clinical features suggestive of osteochondroma malignant (sarcomatous) transformation is 1:



  • G: growth after skeletal maturity
  • L: lucency (new)
  • A: additional scintigraphic activity
  • D: destruction (cortical)
  • P: pain after puberty
  • a: and
  • S: soft tissue mass
  • T: thickened cartilage cap >1.5 cm

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