Presentation
Knee pain.
Patient Data
Mass in the medial distal femoral metaphysis. Lesion is low signal on T1, high on T2 and shows enhancement. There is some surrounding bone and soft-tissue edema, cortical disruption and early soft-tissue extension of tumor. Periosteal reaction is seen on the plain film. A chondroid lesion is incidentally seen in the lateral proximal tibia.
Medial femoral metaphysis metastasis with periosteal reaction.
Case Discussion
Mass in the medial distal femoral metaphysis. Lesion is low signal on T1, high on T2 and shows enhancement. There is some surrounding bone and soft-tissue edema, cortical disruption and early soft-tissue extension of tumor. Periosteal reaction is seen on the plain film. A chondroid lesion is incidentally seen in the lateral proximal tibia.
In a patient this age, an aggressive lesion with this appearance is most likely a metastasis. This woman had a known past history of breast cancer.
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