TY - JOUR T1 - The impact of rheumatoid factor and ACPA on bone erosion in rheumatoid arthritis JF - Annals of the Rheumatic Diseases JO - Ann Rheum Dis SP - e4 LP - e4 DO - 10.1136/annrheumdis-2014-206631 VL - 74 IS - 1 AU - Carolin Hecht AU - Georg Schett AU - Stephanie Finzel Y1 - 2015/01/01 UR - http://ard.bmj.com/content/74/1/e4.abstract N2 - In their letter, Van Steenbergen and colleagues present data on the radiographic progression in rheumatoid arthritis (RA) patients stratified for anti-citrullinated protein antibody (ACPA) and rheumatoid factors (RFs) in two different patient cohorts.1 They show that the presence of ACPA is associated with a more pronounced progression of structural damage when scoring conventional radiographs by the standardised Sharp–van der Heijde method.1 These findings (i) underline previous radiographic findings that ACPAs are associated with radiographic progression in RA,2 (ii) stay in line with the known pathophysiologic function … ER -