symptoms of depersonalization/derealization disorder include all of the following except
Depersonalization/ Derealization Disorder The conditions below may cause a person to describe symptoms similar to Depersonalization/Derealization disorder. 1  Illness anxiety disorder, for example if there are vague physical complaints or fears of permanent brain damage. 2  Major depressive disorder if only numbness, deadness and apathy occur. - Symptoms and Signs. Symptoms of depersonalization/derealization disorder are usually episodic and wax and wane in intensity. Episodes may last for only hours or days or for weeks, months, or sometimes years. But in some patients, symptoms are constantly present at an unchanging intensity for years or decades.