[Comorbidity in obsessive-compulsive disorder]

It has been identified for a long time that obsessive-compulsive disorder (OCD) coexists with other psychiatric disorders: in over 50 percent of the OCD, patients meet the criteria for at least one axis I disorder (depression, anxiety disorders, eating disorders, impulse control disorders). Depressive disorders are the most commonly co-occurring difficulties and associated with significantly higher level of impairment and distress. Eating disorders and impulse control disorders are common comorbidity in OCD. These disorders as eating disorders, body dysmorphic disorder, trichotillomania, pathological gambling, share similarities in etiology, comorbidity, clinical features and treatment. Actually the notion of a spectrum of obsessive-compulsive related disorders is suggested by numerous studies.