![This is an x-ray of the thigh just above the knee showing an osteosarcoma. The arrow points to the whiter region, which is the tumor.](https://www.mskcc.org/sites/default/files/styles/large/public/node/2897/image/268243.gif)
This is an x-ray of the thigh just above the knee showing an osteosarcoma. The arrow points to the whiter region, which is the tumor.
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