Presentation
Painful right knee.
Patient Data
Age: 30 years
Gender: Male
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A (1.2 x 1.6 x 1.9 cm) sessile bony outgrowth is seen projecting from the lateral part of the supracondylar region of right femur, showing regular overlying cartilaginous cap averaging 7 mm in thickness, reflecting osteochondroma.
Case Discussion
Distal femoral supra-condylar sessile osteochondroma with no suspicious MRI features, as described.
A mnemonic for malignant (sarcomatous) transformation: GLAD PaST
- 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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