A 30 years old male presented with hip pain for the last 6 months. Hip X-ray is as shown below. What is the most likely diagnosis?
A. Giant cell tumor
B. Simple bone cyst
C. Multiple myeloma
Ans: A. Giant cell tumor
(Ref Apley 9/e p202, 215)
- Characteristic of giant cell tumor (osteoclastoma).
- The tumour always abuts against the joint margin in osteoclastoma.
X-ray (Giant cell tumor):
- 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 mature bone, extending right up to the subchondral plate, is so characteristic that the diagnosis is seldom in doubt.