Which disorders are included in the DSM-5 category of obsessive-compulsive and related disorders?

• A. A category including OCD and hoarding disorder
• B. A group of mood disorders
• C. A subset of personality disorders
• D. A set of feeding and eating disorders

Answer: (A)

This category groups disorders that share features of intrusive thoughts and repetitive behaviors or mental acts. In DSM-5, obsessive-compulsive and related disorders include obsessive-compulsive disorder as well as hoarding disorder, body dysmorphic disorder, trichotillomania (hair-pulling), and excoriation (skin-picking). Saying it’s a category that includes OCD and hoarding disorder captures the essence of this grouping, since both are part of the same family of conditions characterized by obsessive-like preoccupations and repetitive behaviors. Other diagnostic groups—mood disorders, personality disorders, and feeding/eating disorders—lie in different chapters and are not part of this category.