Enchondroma (distal femur)
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At the time the case was submitted for publication Safwat Mohammad Almoghazy had no recorded disclosures.View Safwat Mohammad Almoghazy's current disclosures
A case of left breast malignant phylloides underwent mastectomy. Staging PET/NAF revealed increased uptake at the left distal femoral shaft.
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Intramedullary subtle lucent lesion with foci of calcifications (chondroid matrix) of the distal femoral diaphysis.
Radiographic features are suggestive of an enchondroma. Follow-up to exclude the possibility of a low-grade chondrosarcoma has been recommended.
Enchondromas are a relatively common benign medullary cartilaginous neoplasm with benign imaging features. Enchondromas are most frequently diagnosed in childhood to early adulthood with a peak incidence at 10-30 years old. Mostly, they are an incidental finding. They are usually asymptomatic but may be complicated by a pathological fracture or malignant transformation into chondrosarcoma, which is rare.