Psych · General adult psychiatry — factitious disorder and malingering
Factitious disorder and malingering
Also known as Munchausen syndrome · Munchausen by proxy · Factitious disorder imposed on self · Factitious disorder imposed on another · Fabricated or induced illness · Medical child abuse · Feigning · Symptom exaggeration · SIRS · Performance validity
Exam-exhaustive fellowship reference on factitious disorder (self and other) versus malingering — intentionality continuum, hospital and forensic assessment, collateral and documentation, ethics without collusion, FII/MCA safeguarding, validity testing, and non-punitive coordinated management. FRANZCP-primary, globally tagged.
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Target exams
Red flags
- Life-threatening self-induced injury (sepsis from injection, severe hypoglycaemia, bleeding, overdose) — treat medically first; do not delay for psychiatric labelling
- Child or vulnerable adult with unexplained recurrent illness and carer-linked pattern — emergency safeguarding pathway; do not rely on psychiatry alone
- Staff collusion, false certification, or continuation of high-risk procedures solely to maintain alliance when deception is highly probable
- Solo confrontational accusation without multidisciplinary plan — risk of flight, escalation, or litigation
- Assuming all inconsistency is factitious and missing undiagnosed organic disease
- Punitive discharge without safety net when self-harm or iatrogenic dependency is active
Meet the patient
A 34-year-old nurse is admitted with her fourth episode of severe, unexplained hypoglycaemia this year — her third hospital. The endocrine work-up is pristine: insulin sky-high, C-peptide suppressed. Exogenous insulin; her own pancreas had nothing to do with it. She has surgical scars from two "diagnostic" laparoscopies, and she visibly brightens when the team proposes another procedure.[4][5]
The examiner's question is not "is she faking?" It is: what does she gain, who is in danger, and what does your team do on Monday morning?[2][18]
References18ShowHide
- [1]Asher R Munchausen's syndrome Lancet, 1951.PMID 14805062
- [2]Bass C, Halligan P Factitious disorders and malingering: challenges for clinical assessment and management Lancet, 2014.PMID 24612861
- [3]Yates GP, Feldman MD Factitious disorder: a systematic review of 455 cases in the professional literature Gen Hosp Psychiatry, 2016.PMID 27302720
- [4]Reich P, Gottfried LA Factitious disorders in a teaching hospital Ann Intern Med, 1983.PMID 6881779
- [5]Krahn LE, Li H, O'Connor MK Patients who strive to be ill: factitious disorder with physical symptoms Am J Psychiatry, 2003.PMID 12777276
- [6]Eastwood S, Bisson JI Management of factitious disorders: a systematic review Psychother Psychosom, 2008.PMID 18418027
- [7]Bass C, Glaser D Early recognition and management of fabricated or induced illness in children Lancet, 2014.PMID 24612863
- [8]Bass C, Jones D Psychopathology of perpetrators of fabricated or induced illness in children: case series Br J Psychiatry, 2011.PMID 21804147
- [9]Slick DJ, Sherman EM, Iverson GL Diagnostic criteria for malingered neurocognitive dysfunction: proposed standards for clinical practice and research Clin Neuropsychol, 1999.PMID 10806468
- [10]Mittenberg W, Patton C, Canyock EM, Condit DC Base rates of malingering and symptom exaggeration J Clin Exp Neuropsychol, 2002.PMID 12650234
- [11]Rogers R, Kropp PR, Bagby RM, Dickens SE Faking specific disorders: a study of the Structured Interview of Reported Symptoms (SIRS) J Clin Psychol, 1992.PMID 1401150
- [12]Caselli I, Poloni N, Ielmini M, Diurni M Epidemiology and evolution of the diagnostic classification of factitious disorders in DSM-5 Psychol Res Behav Manag, 2017.PMID 29270035
- [13]Jafferany M, Khalid Z, McDonald KA, Shelley AJ Psychological Aspects of Factitious Disorder Prim Care Companion CNS Disord, 2018.PMID 29489075
- [14]Schnellbacher S, O'Mara H Identifying and Managing Malingering and Factitious Disorder in the Military Curr Psychiatry Rep, 2016.PMID 27752984
- [15]Ross CA Problems With Factitious Disorder, Malingering, and Somatic Symptoms in DSM-5 Psychosomatics, 2019.PMID 30527844
- [16]Rogers R, Bender SD, Hartigan SE An overview of malingering and deception in neuropsychiatric cases Behav Sci Law, 2024.PMID 38047870
- [17]Bass C, Halligan P Factitious disorders and malingering in relation to functional neurologic disorders Handb Clin Neurol, 2016.PMID 27719868
- [18]Margolis M, Wong TL, Shmuts R, Taylor JB Consultation-Liaison Case Conference: A Case of Factitious Disorder Imposed on Self J Acad Consult Liaison Psychiatry, 2023.PMID 37499871