Definition
Rare benign chondrogenic tumour on the surface of the bone
Epidemiology
10 - 20 years
Most common in the proximal humerus
- proximal femur
- distal femur
Xray
Shallow cortical defect on the surface of long bones
CT
MRI
DDx
Juxta-cortical chondrosarcoma
Periosteal / parosteal osteosarcoma
Osteochondroma
Histology
DDx Chondrosarcoma
Bland hyaline cartilage
Management
Marginal excision +/- reconstruction
