Sandbox: Bone DDx
- <20 yo males
- Joint pain, muscle wasting, tenderness, and swelling/local mass
- Well defined lucent lesions located at the epiphysis
- Lobulated margins with a thin sclerotic rim
- Internal calcifications
- Joint effusion
- Abundant extracellular material
- Eosinophilic cytoplasm
- Calcifications surround cells nests
- Chickenwire appearance
- S100+ve
- Vimentin +ve