Patient Data
Age: Young adult
Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.
From the case:
Avascular necrosis of the knee
![](https://prod-images-static.radiopaedia.org/images/151/db605b0bdd822e6fad74dc7be3765c_thumb.jpeg)
![](https://prod-images-static.radiopaedia.org/images/903/10d4349e2be283613e5ca0f032b5eb_thumb.jpeg)
![](https://prod-images-static.radiopaedia.org/images/904/67563a336acc383be06ff0377e6a0b_thumb.jpeg)
![](https://prod-images-static.radiopaedia.org/images/905/325f176b8b992990053179d60d5756_thumb.jpeg)
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Info
![](https://prod-images-static.radiopaedia.org/images/151/db605b0bdd822e6fad74dc7be3765c_big_gallery.jpeg)
Multiple geographic regions of abnormal bone marrow signal with double line sign and rim sign, features characteristic of avascular necrosis.
From the case:
Avascular necrosis of the knee
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Info
![](https://prod-images-static.radiopaedia.org/images/214/2627f4636ddf1bbd62674a95f17074_big_gallery.jpeg)
Open arrow = double line sign; Simple arrow = rim sign
Case Discussion
This young bone marrow recipient patient is on high dose steroids, and developed extensive AVN of the knee.