A 20-year old male patient present with pain movement. X-ray of knee joint shows lytic lesion on the upper end of tibia. What is the likely diagnosis?
A. Simple bone cyst
C. Multiple myeloma
Ans: D. Osteoclastoma
(Ref Apley 9/e p202)
- Given history & X-ray with epiphyseal lytic lesion in tibia with a `soap bubble’ appearance is characteristic of osteoclastoma.
- The tumour always abuts against the joint margin in osteoclastoma.
X-ray findings of Giant-cell Tumour:
- Radiolucent area situated eccentrically at the end of a long bone & bounded by subchondral bone plate.
- The centre sometimes has a soap-bubble appearance due to ridging of the surrounding bone.
- Appearance of a ‘cystic’ lesion in maturc hone, extending right up to the subchondral plate, is so characteristic that the diagnosis is seldom in doubt.