Pathological features of established osteoarthritis with hydrathrosis are similar to rheumatoid arthritis

ConclusionsPrevious reports showed the histological similarity between RA and early OA with effusion. We confirmed this histological similarity, in particular the distribution of lymphocytes, between RA and established OA with effusion. It is possible that cases diagnosed as OA with effusion might progress to overt RA.Key Points:• Histological similarity was observed between RA and established OA with effusion.
Source: Clinical Rheumatology - Category: Rheumatology Source Type: research