Enchondroma
Benign and asymptomatic. Located in central metaphysis – results from a failure of normal endochondral ossification below growth plate; usually in 3rd –4th decade; M=F;
Most often affects small bones of hands and feet.
Can cause pathologic fractures
2% in adults transform to chondrosarcoma
May predispose to pathological fracture.
X-ray – central radiolucent lesion with well defined bony margin; some calcification and endosteal erosion.
Treatment – none as prognosis is good– follow up with x-rays. If symptomatic, begins to enlarge excision
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