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.
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