To evaluate the relationship between the UltraSound Score for Erosions (USSe) and the modified Sharp/van der Heijde score for erosions (SHSe).
One hundred eight patients with rheumatoid arthritis (RA) were included. On radiography, SHSe was evaluated by 2 or 3 blinded readers (in case of discordance). On ultrasonography, erosions were scored on 6 bilateral joints (metacarpophalangeal joints 2,3,5; metatarsophalangeal joints 2,3,5) with a 4-point scale to calculate the USSe.
The Pearson correlation was good (r = 0.68, 
The USSe seems to be a valuable tool for assessing erosive damage in RA.