Clinicians should consider OCD in their differential when evaluating tics and mood and anxiety disorders, as people with OCD do not routinely seek help for the condition. Indeed, often individuals with OCD actively avoid seeking help. Imaging modalities, while of value for research, are not indicated for normal workups.
Another common pitfall is the failure to identify comorbid diagnoses encountered in OCD patients, including the following:
Major depressive disorder (30%-70%)
Panic disorder (14%-35% lifetime incidence)
Body dysmorphic disorder (14.5%)
Generalized anxiety disorder (20%)
Social phobia and simple phobia (24%)
Attention-deficit/hyperactivity disorder (ADHD)
Tourette syndrome (5%-7%) and other tic disorders (20%-30%)
Impulse-control disorders (eg, trichotillomania)
For more on the workup of OCD, read here.
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Cite this: Stephen Soreff. Psychiatry Fast Five Quiz: How Much Do You Know About Obsessive-Compulsive Disorder? - Medscape - Dec 01, 2016.