63-year-old patient with knee pain. What do you see?
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IMAGING FINDINGS
Lucent distal femur epiphyseal lesion with thin sclerotic borders and rings-and-archs calcifications, characteristic of chondral matrix
What is the most likely diagnosis?
Enchondroma
CASE 2
Malignant counterpart chondrosarcoma in spinous process of lumbar spinal vertebra
What do you see?
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Teaching points
Enchondroma
Characteristic findings: location epiphysis, thin sclerotic borders and rings-and-archs calcifications
It might be indistinguishable from chondrosarcoma on imaging, and pain may raise the latter suspicion
If bone aggressive lysis, striking endosteal scalloping or soft tissue component is present,
