52-year-old male with high-grade sarcoma of the left tibia. Evaluate prior to surgery.IMAGE ACQUISITIONS: CT of the left tibia/fibula without intravenous contrast. As seen on the recent MRI, there is a lytic lesion involving the anterolateral proximal tibial diaphysis and the anterior tibial tuberosity with associated partially mineralized soft tissue component that is consistent with the given history of high grade sarcoma. The lesion appears to be predominantly cortically based.Lack of intravenous contrast limits accurate measurement of the mass. However, it is approximately 3.7 x 5.1 cm in axial dimension (image 325, series 7) and 7.4 cm in craniocaudal dimension (image 87, series 80773). Edema and stranding in the subcutaneous fat anterior to the mass is again noted.There is mild osteoarthritis of the knee. The remainder of the leg is within normal limits.Multiple markers along the leg are presumably presurgical.
Destructive, predominantly cortically based lesion of the proximal tibia, as described above.