Hoarding was long treated as a symptom of obsessive-compulsive disorder. How is hoarding disorder characterised now?

1. Considerable evidence indicates that hoarding represents an entirely different disorder from obsessive-compulsive disorder. 2. People with hoarding disorder cannot bear to part with possessions however valueless, so clutter fills their living areas. 3. The diagnosis is made only when the hoarding is not caused by another medical condition or a symptom of another disorder. 4. Body dysmorphic disorder concerns a perceived flaw in appearance, which is a different preoccupation entirely. 5. Hoarding disorder sits with obsessive-compulsive and related disorders, not under anxiety or dissociative headings. _Source: OpenStax Psychology (1st ed., CC BY 4.0), Ch 15 "Psychological Disorders", section 15.5 Obsessive-Compulsive and Related Disorders_