Osteochondroma / Exostosis

It is not a true bone tumor and always a benign one. But it can turn Malignant and we need to be careful regarding that.

The features associated with sarcomatous transformation can be remembered by the mnemonic


growth after skeletal maturity
lucency (new)
additional scintigraphic activity
destruction (cortical)
pain after puberty
soft tissue mass
thickened cartilage cap greater than 2 cm