Chapter 12 The locomotor system/Fig 12.24.jpg

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Resection of distal femur. The gross appearances reflect those of the radiograph in Figure 12.22. There is a large tumour occupying much of the medullary canal; it has penetrated through the cortex into soft tissue. This extraosseous mass has shrunk, representing a good response to preoperative
chemotherapy. Tumour has also penetrated the physeal plate to extend into the epiphysis, indicating this is an incomplete barrier to tumour spread.