Available online http://arthritis-research.com/content/11/1/401 Page 1 of 1 (page number not for citation purposes) After publication of our recent article [1], we noticed an error in the legend of figure 2: “The marrow soft tissues have an increased water content due to the osteitis that is seen as a high signal on fat suppression MRI (grey squares), as shown in (b).” This sentence should refer to panel (b) in figure 1. The correct sentence is: The marrow soft tissues have an increased water content due to the osteitis that is seen as a high signal on fat suppression MRI (grey squares), as shown in figure 1(b). Reference 1. McGonagle D, Tan AL: What magnetic resonance imaging has told us about the pathogenesis of rheumatoid arthritis - the first 50 years. Arthritis Res Ther 2008, 10:222. Correction Correction: What magnetic resonance imaging has told us about the pathogenesis of rheumatoid arthritis - the first 50 years Dennis McGonagle and Ai Lyn Tan Academic Unit of Musculoskeletal Disease, University of Leeds and Chapel Allerton Hospital, Chapeltown Road, Leeds, LS7 4SA, UK Corresponding author: Dennis McGonagle, d.g.mcgonagle@leeds.ac.uk Published: 22 January 2009 Arthritis Research & Therapy 2009, 11:401 (doi:10.1186/ar2593) This article is online at http://arthritis-research.com/content/11/1/401 © 2009 BioMed Central Ltd See related review by McGonagle and Tan, http://arthritis-research.com/content/10/5/222 . AL: What magnetic resonance imaging has told us about the pathogenesis of rheumatoid arthritis - the first 50 years. Arthritis Res Ther 2008, 10:222. Correction Correction: What magnetic resonance. resonance imaging has told us about the pathogenesis of rheumatoid arthritis - the first 50 years Dennis McGonagle and Ai Lyn Tan Academic Unit of Musculoskeletal Disease, University of Leeds. http:/ /arthritis- research.com/content/11/1/401 Page 1 of 1 (page number not for citation purposes) After publication of our recent article [1], we noticed an error in the legend of figure 2: “The