IMPORTANT: We currently have a number of bugs related to image cropping and are actively trying to resolve them. In the meantime, we have disabled cropping. Apologies for any inconvenience. Stay informed: radiopaedia.org/chat

Incudomalleolar dysarticulation

Case contributed by Frank Gaillard
Diagnosis certain

The head of malleus in the attic on the right is seen in isolation; the incus in not present (on a lower slice, not shown). This is in keeping with disarticulation of the incudomalleolar joint. 

Case Discussion

The articulation of the incus and malleus should appear as an ice-cream ball on an ice-cream cone on axial images and should be check area on all scans through the region, especially if head trauma and base of skull fractures are present. 

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.