Intra-articular injection of hyaluronic acid (HA) is well known to improved pain and function in patients with osteoarthritis (OA) [1,2]. As for rheumatoid arthritis (RA) patients with knee osteoarthritis, current medication for injection therapy includes steroid, hyaluronic acid, and platelet-rich plasma (PRP). In this article, we collected current studies regarding to this issue and suggest future possible research direction.
Intra-articular corticosteroid injection is long to be known as a useful adjunct therapy for the management of RA. Intra-articular injection of corticosteroid has been shown to provide clinical benefit up to 6 months and even longer . From a pharmacological point of view, corticosteroid injection is able to decrease the expression of citrullinated proteins, monoclonal antibody F95, and peptidylarginine deiminase  in RA synovium, and the side effect is low. According to the subanalyses from the BeSt study,  eight-year radiographs showed similar damage in injected joints and noninjected joints. From a clinical point of view, corticosteroid injection remains a safe and cost effective way for managing RA-related OA.Read More