Giant cell tumor of bone
Left hip pain.
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A left proximal femoral purely lytic, eccentric lesion with minimal expansion; difficult to know whether it arises from the epiphysis or metaphysis, but appears to cross the physis.
This patient demonstrates appearances of a giant cell tumor of bone (GCT). Classically, giant cell tumors arise from the epiphysis and do not cross the physis unless it is fused.
This case was histologically proven.