Largely extra-cortical lesion with cortical irregularity on the dorso-medial aspect of the distal femur. The lesion is iso-intense on T1 and hyperintense on T2 and Fat Sat sequences. Thick tendons from the adductor magnus muscle and medial head of the gastrocnemius can be seen attaching to the area of the lesion. A typical non ossifying fibroma (NOF) is seen subcortically in the dorso-lateral femur.
- MRI (T2):