Philip J. Mease, MD, is a clinical professor at the University of Washington School of Medicine in Seattle, where he has also been chief resident and fellow in rheumatology, and is chief of rheumatology clinical research at the Swedish Hospital Medical Center. He is highly involved in clinical trials of new therapies for a number of rheumatic disease conditions, (including rheumatoid arthritis, ankylosing spondylitis, psoriatic arthritis, osteoarthritis, lupus, fibromyalgia and osteoporosis,) and is a founding organizer of GRAPPA (Group for Research and Assessment of Psoriasis and Psoriatic Arthritis.) Publications include numerous articles and book contributions. Philip Mease also sits on review boards for The Journal of Rheumatology, Arthritis & Rheumatism, and The Annals of the Rheumatic Diseases and has received the Medical Communicator Award of the American College of Rheumatology. Dr Mease chairs / co-chairs three working groups of OMERACT (Outcome Measures in Rheumatology): psoriatic arthritis, fibromyalgia and single joint assessment. He is also on the medical advisory boards of pharmaceutical and biotechnology companies, the Lupus Foundation, the Psoriasis Foundation, and the Northwest Arthritis & Osteoporosis Institute. With a strong interest in education, he is also a part of the speakers' bureaus of the Arthritis Foundation, Lupus Foundation, National Psoriasis Foundation, Wyeth Ayerst, SmithKline Beecham, Genelab Technologies, Proctor & Gamble - to name but a few. Philip S. Helliwell, BM, BCh, is currently senior lecturer in rheumatology at the University of Leeds, Academic Unit of Musculoskeletal & Rehabilitation Medicine. His interests include chronic pain, disability, and communication. He has written about the Moll and Wright classification criteria for diagnosing PsA, making the case for retaining at least the two subgroups of peripheral and axial disease and splitting the peripheral disease into oligo- and polyarthritis.

From the reviews: "This is a comprehensive, well illustrated review featuring contributions from leading experts in the filed of psoriasis and psoriatic arthritis. ... the book is intended for rheumatologists, dermatologists, and family practice physicians. I think it is appropriate for rheumatologists and dermatologists in training and as a quick reference for primary care physicians and internists. ... This is a well written, concise, well organized, and illustrative book that can serve as a quick visual guide for clinicians." (Aisha Shaikh, Doody's Review Service, February, 2008) "This is a comprehensive overview of psoriatic arthritis with chapters that consist of brief introductions followed by extensive figures with detailed captions. ... It is intended for rheumatologists, dermatologists, and family practitioners. ... The inclusion of data that supports new treatment modalities is also helpful, enabling the audience to quickly appreciate the efficacy of treatment and associated dosages, as well as the targeted study population. ... this is an authoritative, comprehensive overview of psoriatic arthritis and a valuable reference for its targeted audience." (Amy Marie Archer, Doody's Review Service, September, 2011)

• Epidemiology.- Etiology and Pathophysiology.- Clinical Evaluation.- Imaging.- Skin and Psoriasis.- Juvenile Psoriatic Arthritis.- The Management of Psoriatic Arthritis.- Treatment of Psoriasis.