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Case 31

Ewing Sarcoma

Findings

There is a laminated periosteal reaction along the lower fibular shaft in this patient with unfused epiphyses. This proved to be a Ewing Sarcoma.

Diagnosis

Ewing Sarcoma

Discussion

Ewing Sarcoma accounts for 5-10% of bone tumours, but is the most common malignant bone tumour in children. It has a peak incidence of 15 years, and presents with increasing pain and swelling. The long bones are usually affected in children, the femur being the commonest site. Less than 10% occur in the fibula. The main differential diagnosis is infection.

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