Obsessions, compulsions and related phenomena occur across a wide spectrum of neuropsychiatric disorders. The boundaries between obsessive-compulsive disorder (OCD) and other psychopathological phenomena, such as delusions, impulsions and habits, remain unclear. Further, the subclinical symptoms of OCD are highly prevalent, causing significant impact but yet are poorly understood. To help address these limitations, recent debates have highlighted the importance of a transdiagnostic approach to psychiatry. This book integrates what is currently known about obsessionality, compulsivity and the boundaries of OCD and related disorders and unveils areas that are worthy of future research. Using a transdiagnostic framework, it provides a comprehensive review of the key issues to understanding the diagnosis and evaluation of OCD and related disorders, as well as describing how the clinician can treat OCD and its manifold presentations. Edited by leading specialists in the field, this book offers a global perspective to the diagnosis and treatment of these disorders.

'Top researchers from across the world have contributed to making A Transdiagnostic Approach to Obsessions, Compulsions and Related Phenomena the most comprehensive text published on this topic. The book, which is backed by the latest academic literature, provides a wide-ranging approach to treatment that incorporates psychopathologic, neurobiological, clinical and therapeutic elements. Obsessive-compulsive disorder and associated mental illnesses can be difficult to diagnose. The book provides immense value in providing clinicians and researchers alike with the nuances necessary to identify and help patients to the best extent possible. It will undoubtedly be an indispensable reference document for professionals in this field for years to come.'

Antonio E. Nardi - Universidade Federal do Rio de Janeiro, Brazil

'Professors Fontenelle and Yücel compile an impressive comprehensive and authoritative source on the underpinnings and correlates of OCD and its related disorders. They advance cutting-edge reviews valuable to both clinicians and researchers. This volume represents a current and definitive reference work for these conditions. Uniquely, it also examines cross-diagnostic perspectives involving various contemporary nosologic systems … with respect to classification, treatment and prevention. Additionally, future investigative directions are presented for the multifaceted aspects of these disorders.'

Edward C. Lauterbach - Professor Emeritus of Psychiatry and Neurology, Former Chief, Division of Adult and Geriatric Psychiatry, Founding Director Emeritus, Center for Translational Studies in Neurodegenerative Disease, Mercer University, Georgia, US

'This seminal volume covers virtually all aspects of obsessive-compulsive and related disorders from an innovative transdiagnostic perspective. Much more work is needed to advance this emerging field. But given the expertise of the more than sixty authors from across the globe, I am confident that this volume will become an invaluable resource for years to come both for practitioners as well as for researchers across a broad range of disciplines.'

James F. Leckman - Neison Harris Professor of Child Psychiatry, Psychiatry, Psychology and Pediatrics, Yale University, Connecticut

'A must-read reference to translational approaches to compulsive and obsessive phenomena in neuropsychiatry; Professors Fontenelle and Yücel represent the best clinician-scientists of our generation and assembled an all-star team to accomplish this challenging goal.'

Jorge Moll - Founder and Chairman of the Board of the D’Or Institute for Research and Education, Brazil