Definition: a group of disorders involving various manifestations of anxiety that are grouped together nosologically in the DSM. These include panic disorder (see also panic attack), specific phobia, formerly simple phobia (see phobia); social phobia that was formerly called social anxiety disorder; obsessive-compulsive disorder (OCD); (see also obsession, compulsion, obsessive-compulsive); posttraumatic stress disorder (PTSD); acute stress disorder; generalized anxiety disorder (GAD); and anxiety disorders secondary to medical conditions or substance-induced or not otherwise specified.
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