Editorial Comment on I. Sudoł-Szopińska, E. Kontny, W. Maśliński, M. Prochorec-Sobieszek, B. Kwiatkowska, K. Zaniewicz-Kaniewska, A. Warczyńska The pathogenesis of rheumatoid arthritis in radiological studies. Part I: Formation of inflammatory infiltrates within the synovial membrane and I. Sudoł-Szopińska, K. Zaniewicz-Kaniewska, A. Warczyńska, G. Matuszewska, F. Saied, W. Kunisz The pathogenesis of rheumatoid arthritis in radiological studies. Part II: Imaging studies in rheumatoid arthritis

In the recent years, musculoskeletal ultrasound (US) has been developing rapidly as a method evaluating the intensity of the inflammatory process in inflam‑ matory joint diseases including rheumatoid arthritis (RA). The series of articles entitled: The pathogenesis of rheumatoid arthritis in radiological studies (parts 1 and 2)(1,2) enable a deeper insight into the relation between the disease progression and changes vis‑ ible on imaging such as US and magnetic resonance imaging (MRI). As the authors of the articles empha‑ size, these methods are important for the determina‑ tion of the exact natural course of the disease, diag‑ nostic differentiation of RA as well as monitoring its activity.