From the case:
Non-ossifying fibroma
![](https://prod-images-static.radiopaedia.org/images/341199/5649b9e4e0164fd9f3a449a4cb6f64a60a8f4137ee8012838d21f427b1d0d755_thumb.jpeg)
![](https://prod-images-static.radiopaedia.org/images/57978625/0._thumb.jpeg)
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![](https://prod-images-static.radiopaedia.org/images/341199/5649b9e4e0164fd9f3a449a4cb6f64a60a8f4137ee8012838d21f427b1d0d755_big_gallery.jpeg)
Endosteal soap-bubbly lesion along the posterior aspect of the proximal tibial diaphysis.
From the case:
Non-ossifying fibroma
![](https://prod-images-static.radiopaedia.org/images/341200/bb7ab878b4e8f085d0f6ede752b7f81796c60b6ec4fc3e66075bd2a6d336391a_thumb.jpeg)
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Heterogenously high STIR signal with areas of low signal on both T1 and STIR.