Rheumatoid arthritis - knee

Case contributed by Roberto Schubert
Diagnosis almost certain


Patient with known RA presenting with knee pain and a mass in the back of the knee.

Patient Data

Age: 55 years
Gender: Female

This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.


Large Baker cyst with heterogeneous soft-tissue inclusions.

Case Discussion

MRI showed a large Baker cyst with synovial pannus as well as thickening and hyperthrophy of the synovial membranes of the knee.

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.