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Review Question - QID 7490

Bone Tumor Staging Systems QID: 7490 (SAE11PA.10)
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QID 7490 (Type "7490" in App Search)
A 12-year-old boy is diagnosed with osteosarcoma of the left distal femur. The lesion measures 7 cm in its greatest dimension and is associated with a soft-tissue mass that extends into the vastus lateralis. A CT scan of the chest is normal. A bone scan reveals another lesion in the contralateral right proximal femur. Biopsy of the right proximal femur lesion also reveals osteosarcoma. According to the American Joint Committee on Cancer (AJCC), what is the stage of this tumor?
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