This new companion to Hochberg et al.'s Rheumatology masterwork focuses on the momentous recent advances in our understanding of the genetics and immunology of psoriatic and reactive arthritis, and their implications for diagnosis and management. Leading international authorities explore new concepts in genetic and pathogenic mechanisms and early diagnosis; provide comprehensive, well-illustrated coverage of clinical features; evaluate the very latest therapeutic options, including biologics; and discuss clinical outcome measures. Examines the very latest pathogenic mechanisms and diagnostic criteria, providing the necessary tools for early diagnosis and monitoring of disease progression. Offers comprehensive coverage of the clinical manifestations of psoriatic and reactive arthritis, including a ₁mini atlas' of color plates. Examines the pros and cons of the available therapeutic options, including the very latest biological as well as traditional therapies. Includes practical discussions of clinical outcome measures, delivering ongoing tools for assessment of function, disease activity, and quality of life.