The field of rheumatology has undergone numerous exciting advances in recent years, especially the development of biological drugs with novel targets, made possible by rapid advances in the basic science of musculoskeletal diseases together with improved imaging techniques. This thoroughly revised fourth edition of the Oxford Textbook of Rheumatology reflects the changing face of the specialty and the many recent advances in the science, treatment, and understanding of rheumatic diseases. The focus of this comprehensive reference work is the presentation and management of rheumatic conditions at all ages.