Presentation
Pain in knee and distal femur
Patient Data
Age: 35
Gender: Male
From the case:
Solitary lucent lesion: osteoid osteoma vs enchondroma
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A cystic appearing lesion is seen in distal femur, with an irregular probably thin sclerotic margin.
From the case:
Solitary lucent lesion: osteoid osteoma vs enchondroma
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A lucent oval lesion with a calcific nidus is seen.
Case Discussion
This is a case being considered as osteoid osteoma. However, possibility of enchondroma have also been raised. As patient is responding to aspirin, no surgical intervention is planned yet. Follow-up of the lesion is advised.
Differential diagnosis (on MR images)