Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.
From the case:
Cholesterol granuloma
![](https://prod-images-static.radiopaedia.org/images/566676/2af97d9c78ed76719d12d3a7a4690d_thumb.jpg)
![](https://prod-images-static.radiopaedia.org/images/566677/114132a5a40efc66b837c58668950a_thumb.jpg)
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Info
![](https://prod-images-static.radiopaedia.org/images/566676/2af97d9c78ed76719d12d3a7a4690d_big_gallery.jpg)
An oval-shaped isodense expansile osteolytic lesion at the apex of left petrous bone with thin smooth borders. Normal adjacent bone matrix.
From the case:
Cholesterol granuloma
![](https://prod-images-static.radiopaedia.org/images/566679/573f7e974b1c37fd9accf4990aadb7_thumb.jpg)
![](https://prod-images-static.radiopaedia.org/images/566691/ea081ad7a79d100ea0a0f3c4d81d95_thumb.jpg)
![](https://prod-images-static.radiopaedia.org/images/566706/ec9017378ec1e986813cbd023610ba_thumb.jpg)
![](https://prod-images-static.radiopaedia.org/images/566712/eaa2b7117ddce700aecd370a1d4a68_thumb.jpg)
![](https://prod-images-static.radiopaedia.org/images/566713/cf16728788ae9f36042a760fe73fbb_thumb.jpg)
![](https://prod-images-static.radiopaedia.org/images/566678/0e2103b8a18d7aee68b3e939fa61ba_thumb.jpg)
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Info
![](https://prod-images-static.radiopaedia.org/images/566679/573f7e974b1c37fd9accf4990aadb7_big_gallery.jpg)
Left petrous apex shows an oval-shaped lesion with high signal intensity on T1 and mixed layered signal intensity on T2 with hypointense lower layer. Smooth hypointense margins of the lesion.
Case Discussion
CT and MRI features of left petrous apex cholesterol granuloma.
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