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

” GLAD PAST ”

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