Presentation
Painful swelling of the left distal thigh.
Patient Data
Age: 14 years
Gender: Male
From the case:
Chondroblastic osteosarcoma
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The MRI sequences demonstrate:
- abnormal signal of the femoral bone marrow of metadiaphyseal location, extending from the mid-third of the femoral shaft up to the distal metaphysis with aggressive osteolysis, extensive periosteal reaction, and thinning with irregularity of the cortical bone with a cortical break
- periosseous heterogeneously enhancing soft tissue mass invading and displacing the surrounding muscles, mainly the vastus lateralis
- epiphyseal extension of the tumoral process through the growth plate
Case Discussion
MRI features of an extensive femoral tumoral process with periosseous soft tissue component.
The patient underwent an ultrasound-guided biopsy that confirmed the diagnosis of chondroblastic osteosarcoma.