Dr. Felice Rivellese from the Center of Experimental Medicine and Rheumatology at the Queen Mary University in London discusses the results of his presentation at the ACR 2019 with Dr. Caroline Ospelt. In a subanalysis of the pathobiology of the Early Arthitis Cohort (PEAC), Rivellese at al could show that B cell-rich synovitis is associated with disease severity and radiographic progression, in particular, if B cell infiltrates persist after cDMARD treatment.