Presentation
Knee pain.
Patient Data
Age: 45 years
Gender: Male
From the case:
Enchondroma
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X-ray of the left femur showed two lesions with typical rings and arcs calcifications in the metadiaphysis. The endostal cortical border was not eroded.
Case Discussion
Features are consistent with enchondroma (or chondroma) which is a relatively common benign medullary cartilaginous neoplasm with benign imaging features. Chondroid calcifications (rings and arcs calcification) may be present. It should be reminded that distinguishing between enchondroma and low-grade chondrosarcoma is a frequent difficulty as the lesions are both histologically and radiographically very similar.