Which of the following is a metadiaphyseal, permeative, osteolytic lesion with aggressive periosteal changes and saucerization of the cortex that is found in patients younger than 30 years of age?

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The provided description matches the classic radiographic appearance of an Ewing sarcoma, which commonly affects children and young adults. Multiple myeloma typically presents with diffuse osteopenia and lytic lesions in the axial skeleton, while metastatic bone disease presents with multiple lesions in unusual locations. Giant cell tumors are generally localized, eccentric, and involve the epiphysis of long bones.

Which of the Following Is a Metadiaphyseal, Permeative, Osteolytic Lesion