Only right knee pain which comes and goes . Suddenly the pain worsened . The MRI showed: minimal to gross joint effusion. Grade 2 injury of patellar tendon. Enhancement of hoffas fat pad. Blood test:
crp and esr were high .
Uric acid , rf factor, cbc were normal. No recent injuries too. Last knee injury was 5 year back due to a fall upon mri that showed minimal joint effusion. Other things were normal. What is the exact cause? Is it a type of chronic inflammatory arthritis or any other like pvns?