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Juxta-articular chondroma Kaposi's Sarcoma Large cell lymphoma, Leimyosarcoma, Leiomyosarcoma, Letterer-Siwe disease, Leukemia, Low-grade intramedullary osteogenic sarcoma, Lumbosacral lipoma, Lymphangioma, Lymphangiomatosis, Lymphoma, Lymphoma pseudotumor (Actual: radiation osteitis), Lymphoma pseudotumor (Actual: stress fracture), Lymphoma with secondary osteogenic sarcoma Maffucci's Syndrome, Maligant fibrous histiocytoma pseudotumor (Actual: Hematoma), Malignant fibrous histiocytoma (MFH).
Osteogenic sarcoma, low-grade intramedullary - Distal femur - CT scan
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Osteogenic sarcoma, low-grade intramedullary - Distal femur - CT scan
  • Case ID: 114
  • Classic Case: true
  • Diagnosis: Osteogenic sarcoma, low-grade intramedullary
  • Category: Bone Tumors
  • Category Type: Osteoid-forming
  • Category Sub Type: Malignant
  • Location: Distal femur
  • Age: 63
  • Sex: F
  • Treatment: Total knee arthroplasty
  • Image ID: 1419
  • Image Type: CT scan
  • Images relating to this case: 955 , 1417 , 1418 , 1419, 1420 , 1421 , 1422 .

CT scan of both distal femori shows evidence of chronic dilatation of the distal femoral metaphysis with sclerotic response seen at the periphery of a lytic lesion with matrix calcification that could suggest fibrous dysplasia or even chondrosarcoma. There is no evidence of any extracortical activity that one would expect to see in osteosarcoma.


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