Psychiatrists Report Case of Pseudologia Fantastica
A Boston hospital patient presented with elaborate false stories and symptoms mimicking appendicitis.
Updated on Oct. 21, 2026 in Autism
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Psychiatrists at a Boston hospital diagnosed a 28-year-old male with pseudologia fantastica after he presented with fabricated claims about his career and personal history. The patient, who mimicked appendicitis symptoms, also had a history of opioid use disorder.
Why it matters
The case highlights the complexities of identifying pathological lying, a condition not recognized as a standalone diagnosis in the DSM-5. The patient admitted he manufactured dramatic details to feel significant and ensure he was taken seriously by medical staff.
A 2026 systematic review of 55 cases found that 67% of individuals with the condition engaged in health-related lies, while 44% fabricated their professional or educational history. The patient population in the review ranged from 14 to 68 years old.
The players
Anton Delbrück
He was a 19th-century psychiatrist who is credited with introducing the clinical term for pathological lying.
Annals of Medicine and Surgery
This is a peer-reviewed medical publication that featured the 2026 review of clinical cases involving pathological deceit.
Beth Israel Deaconess Medical Center
This is the Boston-based hospital where the patient sought emergency care and received his diagnosis.
BronxCare Health System
This health system provided the researchers who conducted the systematic review of pseudologia fantastica cases.
The details
Clinicians identified the condition by comparing the man's narrative to his medical records and testimony from his father, who noted a history of poor academic performance and opioid use. Doctors ultimately admitted the man for opioid detoxification.
Timeline
1891: Anton Delbrück first coined the term pseudologia fantastica.
1914 to January 2024: Period analyzed in the systematic review of cases.
May 2026: The systematic review was published in the Annals of Medicine and Surgery.
October 2026: Findings from the Boston case were published.
The Big Picture
The clinical diagnosis exists outside the formal definitions provided by the DSM-5, illustrating a gap in how current psychiatric frameworks categorize complex, non-standard behaviors. This absence complicates standard diagnostic approaches for patients who present with patterns of pathological deceit.
Individuals struggling with substance use or personality disorders may require integrated care to address underlying motivations for deceptive behavior. The case underscores the importance of verifying patient histories against external records to ensure accurate medical treatment.
The takeaway
Clinicians emphasize that verifying narrative consistency with medical records is essential when patients present with improbable life stories. Addressing the underlying psychological factors, such as substance use or personality disorder, is necessary for effective long-term treatment.
Further reading
For additional context on how researchers analyze psychiatric case profiles, visit Boston Autism.
Source note: This article includes information reported by Medical Daily.
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