• Lytic lesion in hands
• with calcification
Enchondroma is name given to intramedullary chondroma.
Well defined
Lytic with matrix calcification
Sharp but not sclerotic margin
There are also periosteal, juxtacortial and soft tissue variants
If more than 4cm craniocudal length or
more than 10% or 36 degrees of endosteal scalloping
more active follow up is required
Patel A et al., A pragmatic approach to the imaging and follow-up of solitary central cartilage tumours of the proximal humerus and knee, Clinical Radiology, https://doi.org/10.1016/j.crad.2019.01.025
ENCHONDROMATOSIS
Olliers disease
Multiple lesions
Often in same bone
Classical appearance in ileum
Higher % of malignant change, circa 25%
MAFUCCI SYNDROME
Multiple enchondromas with haemangioma
Recognosed by soft tissue phlebolith formation
• Protrudes from bone
• Medullar continuity with parent bone
Protrudes from bone so easy to distinguish from other lesions.
Medullary continuity must be present. If not consider BPOP
Cartilage cap and bursa may be present. Cap thickness should not exceed 15mm
• Sclerotic margin
• Eccentric
• Proximal tibia
Eccentric
Round or oval
Metaphyseal but may cross to epiphysis
Well defined with sclerotic or demarcated margin
No matrix calcification
May appear trabeculated
• Epiphyseal
• Children
Classic epiphyseal lesion
Second decade
Proximal tibia, proximal humerus, distal femur, greater trochanter
also ileum
Oval, lytic, well demarcated
50% have matrix calcification
