Presentation
Long standing Crohn's disease
Patient Data
Age: 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:
Fat halo sign
![](https://prod-images-static.radiopaedia.org/images/497/e632b1780cf27a0acf743bf71b7a8a_thumb.jpeg)
![](https://prod-images-static.radiopaedia.org/images/673/1c1de7cbd704b14ff1b61012bbb9f4_thumb.jpeg)
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![](https://prod-images-static.radiopaedia.org/images/497/e632b1780cf27a0acf743bf71b7a8a_big_gallery.jpeg)
Note the fat halo sign seen in the loop of small bowel anteriorly in both cross-section and longitudinally, representing submucosal fat deposition due to chronic inflammation.