@Christoph Agten Thank you. After discussing with the patient when he came to pick up the result. He told me that the pain was more than 6 months old. At first I thought it was tuberculosis, but the fact that it was bilateral made the diagnosis unlikely, especially since I did an ultrasound, and there were no significant synovial abnormalities or intra- or peri-articular effusions. What diagnosis is more probable ?

@Esteban Peghini you can have access to the case https://www.postdicom.com?Share=ee284167-21ae-43a6-9a1b-d42444dac1e2&Lang=0 and the password is Knee2023

@Dean Shippey thank you

@María Pilar Diezhandino thank you

@Christoph Agten thanks you