If an X-ray of the leg shows a mass in the distal femur that extends into the soft tissue and the biopsy shows translocation of chromosomes 11 and 22, what is this patient's diagnosis?

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If an X-ray of the leg shows a mass in the distal femur that extends into the soft tissue and the biopsy shows translocation of chromosomes 11 and 22, the patient's diagnosis is Ewing sarcoma. It is a malignant neoplasm of the bone that originates in the medullary canal and is composed of small uniform round cells and often occurs in teenage males.

If an X-Ray of the Leg Shows a Mass in the Distal