Solitary lucent lesion: osteoid osteoma vs enchondroma

Case contributed by Dr Praveen Jha


Pain in knee and distal femur

Patient Data

Age: 35
Gender: Male

A cystic appearing lesion is seen in distal femur, with an irregular probably thin sclerotic margin.

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)

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Case information

rID: 21663
Published: 8th Feb 2013
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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