# Syndrome of Subjective Doubles: Delusions of Identity and Duplication

## TL;DR

A 23-year-old man believed a musician on social media was his exact duplicate, and his condition improved with treatment.

## Contribution

This case highlights a rare delusional misidentification syndrome with a positive treatment outcome.

## Key findings

- The patient believed a musician on social media was his exact duplicate.
- The delusion improved with medication and psychotherapy.
- The case adds to understanding of a rare and poorly understood disorder.

## Abstract

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.