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

Chordoma - clivus

Case contributed by Frank Gaillard
Diagnosis almost certain
mri

A high T2 signal mass arises from the posterior surface of the clivus and indents the pons. This has been likened to a thumb and the term "thumb sign" has even been proposed. It is said to be relatively specific for a chordoma in the correct clinical and imaging setting.

Case Discussion

This patient went on to have the mass resected which confirmed the diagnosis of chordoma

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.