Because it is a rare and poorly understood condition, there is no established way to diagnose the<unk> . Diagnosis is primarily made on a psychiatric evaluation of the patient, who is most likely brought to a psychiatrist's attention by a family member or friend believed to be an imposter by the person under the delusion.
Capgras delusion
Cotard delusion
Fregoli delusion
Visual hallucinations in psychosis
Monothematic delusion
Grandiose delusions
Homicidal ideation
Persecutory delusion