Clinical remission is now a realistic goal in managing rheumatoid arthritis (RA) with treat to target strategy assessed according to different composite scores (DAS28, Simplified Disease Activity Index (SDAI), Clinical Disease Activity Index (CDAI), ACR-EULAR 2011 for remission). There are, however, no validated ultrasound remission criteria because of continuing uncertainty on the signification of persistent synovial hypertrophy in B-mode or Power Doppler (PD) mode in RA patients in clinical remission.