A good approach to looking at an X-ray demonstrating an abnormality in the bone is to ask seven questions:
- Where is the lesion?
- How large is the lesion?
- What is the lesion doing to the bone?
- What is the bone doing in response?
- Is the lesion making matrix?
- Is the cortex eroded?
- Is there a soft tissue mass?
(from Levesque et al. A Clinical Guide to Primary Bone Tumours)
Sarcoma Notes 