If a few fluid fluid levels were seen, what would this imply?
That the GCT contained an aneurysmal bone cyst (ABC) component.
What are the most common locations for giant cell tumours?
Around the knee (distal femur and proximal tibia : 50 - 65%); distal radius (10 - 12%); sacrum (4 - 9%).
MRI confirms the plain film features. A mass is centered on the distal radius, involving the articular surface of the radiocarpal joint. The mass is solid with intermediate to high T2 signal and low T1 signal and demonstrates relatively homogeneous contrast enhancement. No cystic areas or fluid-fluid levels identified.
High T2 signal (oedema) is seen extending proximally along the interosseous membrane with some fluid also seen within the carpus, but no significant bone marrow oedema. The bone marrow of the more proximal radius, the ulnar and the carpal bones are unremarkable.