damage from an organic disorder) in the right hemisphere, temporal lobe, and/or bi-frontal lobes causes the delusion of subjective doubles. Physical damage resulting in the subjective doubles delusion often includes, but is not limited to, brain lesions or traumatic brain injury. Suspected organic causes of brain damage that may lead to subjective doubles include disorders such as epilepsy. Because other mental illnesses are commonly co-morbid with subjective doubles syndrome, it is unknown whether these types of brain injuries are linked to the delusion or the additional mental illness. For example, right hemisphere brain damage is associated with schizophrenia, which is commonly reported with the delusion of subjective doubles. Treatment A widely accepted treatment for the syndrome of subjective doubles has not been developed. Treatment methods for this disease sometimes include the prescription of antipsychotic drugs, however, the type of drug prescribed depends on the presence of other mental disorders. Antipsychotic drugs (also known as neuroleptics) such as risperidone, pimozide, or haloperidol may be prescribed to treat the underlying psychiatric illness. In addition to drug therapy, interpersonal counseling has also been suggested as a method to ease relations between the patient and his/her suspected doubles. However, the relationship between the patient and his/her double is not always negative. Prognosis Recovery from this syndrome is situational, as some drug therapies have been effective in some individuals but not others. Patients may live in a variety of settings, including psychiatric hospitals, depending on the success of treatment. With successful treatment, an individual may live at home. In many of the reported cases, remission of symptoms occurred during the follow-up period. This disorder can be dangerous to the patient and others, as a patient may interrogate or attack a person they believe to be a double. Inappropriate behavior such as stalking and physical or psychological abuse has been documented in some case studies. Consequently, many individuals with this disorder are arrested for the resulting misconduct (see the case of Mr. B in #Presentation). History This disorder was first defined in 1978 by Greek psychiatrist George N. Christodoulou, M.D., Ph.D., FRCPsych. Although the symptoms of subjective doubles have been described before 1978, the disorder was not given a name until Christodoulou called it the syndrome of subjective doubles in the American Journal of Psychiatry. The article describes an 18-year-old female with hebefreno-paranoid schizophrenia who believed that her next door neighbor had transformed her physical self