Lecture Snippet: Benign Aggressive Lesions

Lesions that are "benign" on X-rays and "aggressive" on MRI

This is a short lecture on the concept of benign aggressive bone lesions. These are lesions that are radiologically “benign” on X-rays with narrow zone of transition and/or sclerotic rim, but look superficially “aggressive” on MRI with marrow edema, enhancement, effusion and periostea reaction, but without a soft tissue mass.