Delusional disorder refers to a condition in which an individual displays one or more delusions for one month or longer. Delusional disorder is distinct from schizophrenia and cannot be diagnosed if a ...

Vance Boelter’s letter to the FBI about his alleged shootings of Minnesota lawmakers reveals grandiose beliefs about his importance in the world and suggests a delusional disorder, according to a ...

Julia Sheffield, Ph.D., a clinical psychologist at Vanderbilt University Medical Center, has dedicated her career to solving the mysteries of psychosis. As a clinician, Sheffield, the Jack Martin, MD ...

Key points Delusional disorder can be hard to detect because the pathology is encapsulated and the person may seem very stable. If someone's delusion becomes believed by others and affects their ...