Syndrome of Subjective Doubles: Delusions of Identity and Duplication

The syndrome of subjective doubles is part of the delusional misidentification syndrome (DMS). In this condition, the patient believes that duplicates of themselves or others exist, often with distinct intentions or characteristics. It is associated with psychiatric and neurological disorders. In this report, we describe the case of a 23-year-old patient experiencing the syndrome of subjective doubles. He endorsed psychosis, and the delusion centered on the belief that a musician on social media is identical to him. His delusion eventually improved with medication management and supportive psychotherapy. This case is presented as an important addition to the literature, aiming to raise awareness of a rare disorder with a poorly understood etiology that resulted in a positive outcome.