Sandbox: Bone DDx
- 10-20 yo patients
- Gradual onset of bone pain
- Limb swelling, tenderness, and warmth
- Palpable lump
- Restricted range of motion
- Bony trabeculae or osteoid tissue
- Osteoclast giant cells
- Benign spindle cells
- Blood-filled spaces of variable sizes
- Sharply defined, expansile osteolytic lesion on CT
- Thin sclerotic margins
- Air-fluid levels
- Doughnut sign on bone scan