An article on OCD discusses what disorders are related enough to
group together. OCD in some respects differs from the other
anxiety disorders in terms of phenomenology, brain circuitry,
family history, and treatment response. Instead, it shares
features of basic etiology, brain circuitry, and genetics with a
group of other related or OCD spectrum disorders. These may
include Tourette’s syndrome; body dysmorphic disorder; autism
and the developmental disorders; eating disorders, including
binge-eating disorder; Huntington’s disorder and Parkinson’s
disorder; pediatric autoimmune neuropsychiatric disorders
associated with streptococcal infections (PANDAS) or Sydenham’s
chorea; some of the impulse control disorders; some of the newly
emerging compulsive and impulsive disorders; and obsessive-
compulsive personality disorder. At issue for the DSM-V is also
whether the hoarders that are currently considered a subtype of
OCD should be thought of as distinct from OCD and placed into
one of the obsessive-compulsive s