The project was conducted in the hope that it would stimulate further scientific investigations into depersonalization disorder. Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5)
In the DSM-5, the word "derealization" was added to "depersonalization disorder" and renamed "depersonalization/derealization disorder" ("DPDR"). It remains classified as a dissociative disorder.Patients must meet the following criteria to be diagnosed per the DSM-5:
Presence of persistent/recurrent episodes of depersonalization/derealization
Ability to distinguish between reality and dissociation during an episode (i.e. patient is aware of a perceptual disturbance)
Symptoms are severe enough to interfere with social, occupational, or other areas of functioning
Symptoms are not due to a substance or medication
Symptoms are not due to another psychiatric disorder

International Classification of Diseases 11th Revision (ICD-11)
The ICD-11 has relisted DPDR as a disorder rather than a syndrome as previously, and has also reclassified it as a dissociative disorder from its previous listing as a neurotic disorder. The description used in the ICD-11 is similar to the criteria found in the DSM-5. Individuals with DPDR are described as having persistent/recurrent symptoms of depersonalization/derealization, have intact reality testing, and symptoms are not better explained by another psychiatric/neural disorder, substance, medication, or head trauma. Symptoms are severe enough to cause distress or impairment in functioning. Differential diagnoses
DPDR differentials include neurologic and psychiatric conditions as well as side effects from illicit substances or medications. Neurologic
Seizures
Brain tumor
Post-concussion syndrome
Metabolic abnormalities
Migraines
Vertigo
Menieres disease

Psychiatric
Panic attack
Phobias
PTSD
Acute stress syndrome
Depression
Schizophrenia
Borderline personality disorder
Other dissociative disorders

Consequence of psychoactive substance use
Marijuana
Hallucinogens
MDMA
Ketamine
Hallucinogen persisting perception disorder

Prevention
Depersonalization-derealization disorder may be prevented by connecting children who have been abused with professional mental health help.
Suzanne Segal had an episode in her 20s that was diagnosed by several psychologists as depersonalization disorder, though Segal herself interpreted it through the lens of Buddhism as a spiritual experience, commonly known as "Satori" or "Samadhi". The song "Is Happiness Just a Word?" by hip hop artist Vinnie Paz describes his struggle with depersonalization disorder. Adam Duritz, of the band Counting Crows, has often spoken about his diagnosis of depersonalization disorder. See also
Anosognosia

References
External links
Depersonalization at Curlie