This collection of essays discusses the disorders covered in the new DSM-5 chapter on obsessive-compulsive and related disorders (ORCDs).

Introduction and major changes for the obsessive-compulsive and related disorders in DSM-5 / --Obsessive-compulsive disorder / -- Body dysmorphic disorder / -- Hoarding disorder / -- Trichotillomania (hair-pulling disorder) / -- Excoriation (skin-picking) disorder / -- Other obsessive-compulsive and related disorders in DSM-5 / -- Tic disorders / -- Illness anxiety disorder / -- Obsessive-compulsive personality disorder / Naomi A. Fineberg, Sukhwinder Kaur, Sangeetha Kolli, Davis Mpavaenda, Samar Reghunandanan -- Dan J. Stein, Katharine A. Phillips. Introduction and Major Changes for the Obsessive-Compulsive and Related Disorders in DSM-5 -- Obsessive-Compulsive Disorder -- Body Dysmorphic Disorder -- Hoarding Disorder -- Trichotillomania (Hair-Pulling Disorder) -- Excoriation (Skin-Picking) Disorder.\ -- Other Obsessive-Compulsive and Related Disorders in DSM-5 -- Tic Disorders -- \Illness Anxiety Disorder -- Obsessive-Compulsive Personality Disorder -- Conclusions.