Presentation
The patient presented with persistent thigh pain after trauma.
Patient Data
MRI of the distal part of the right thigh reveals an osteochondroma on the inner aspect of the distal femoral metaphysis, pointing proximally. Additionally, there is a displaced fracture at the stalk. Posterior to the vastus medialis muscle, we observe surrounding soft tissue edema and hematoma formation. The thin cartilaginous cap is also visible. Axial images depict the remnant part of the stalk.
The frontal and oblique radiographs of the right femur show an osteochondroma on the inner aspect of the distal femoral metaphysis, pointing proximally, with a fracture at the stalk of the osteochondroma.
Case Discussion
Osteochondromas, the most common benign bone tumors, account for 20%-50% of all benign bone tumors and 10%-15% of all bone tumors.
Osteochondromas are usually asymptomatic unless complicated, and fractures are recognized complications of osteochondromas. In our patient, the osteochondroma was discovered after trauma and fracture.
Osteochondroma fractures occur in 5% to 6% of cases, with the knee being the most common location (50% to 86%).
Acknowledgment: Nusaibah Ghaleb Yousef Alnahari
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