What is the broader term for Munchausen behavior when an adult woman and her adult mother collude to misuse the healthcare system?

Factitious Disorder Imposed on Another (FDIA)

The broader term for Munchausen-like behavior when an adult woman and her adult mother collude to misuse the healthcare system is Factitious Disorder Imposed on Another (FDIA), which represents the formal diagnostic terminology that has replaced "Munchausen syndrome by proxy" in modern psychiatric classification. 1, 2

Understanding the Terminology Evolution

The medical community has moved away from the term "Munchausen syndrome by proxy" in favor of more precise diagnostic language:

• Factitious Disorder Imposed on Another (FDIA) is the current DSM terminology for situations where one person deliberately produces or feigns illness in another person under their care, regardless of whether the victim is a child or adult 1, 3
• The term "Munchausen syndrome by proxy" (MSBP) is now discouraged, though still widely recognized clinically, with emphasis shifted to victim-centered terminology 3
• When the victim is an adult rather than a child, the literature specifically refers to this as Munchausen Syndrome by Adult Proxy (MSB-AP) 1

Key Diagnostic Features in Adult Cases

Perpetrator characteristics in adult proxy cases show distinct patterns:

• Most perpetrators (62%) are women, with many working in healthcare settings 1
• The age range of adult victims spans 21 to 82 years 1
• Disease fabrication most commonly results from poisoning 1
• Perpetrators may have psychiatric comorbidities including factitious disorder imposed on self (10%), depression (9%), and personality disorders (7%) 3

Critical warning signs that distinguish FDIA from legitimate medical concerns:

• Complex constellation of symptoms without a unifying medical etiology 1
• Overly involved caregiver with suspected psychological gain 1
• Most adult victims are unaware of the abuse, though collusion between perpetrator and victim can occur in some cases 1
• Recurrence is present in more than three-quarters of documented cases 3

The Collusion Scenario

When both the adult daughter and mother are involved in healthcare system misuse, several diagnostic considerations apply:

• If the mother is fabricating illness in the adult daughter: This represents classic MSB-AP/FDIA, where the mother is the perpetrator and the daughter is the victim (aware or unaware) 1
• If both are actively participating: This may represent either collusion in FDIA or dual factitious disorder imposed on self in both individuals 1, 4
• Intergenerational transmission: Research demonstrates that victims of childhood Munchausen syndrome by proxy can progress from innocent victims to accomplices in their mother's deception, and finally to adult Munchausen syndrome behavior themselves 4

Differential Diagnosis Considerations

The American College of Physicians framework for behavioral health conditions provides context for distinguishing FDIA from other psychiatric presentations:

• Personality disorders (borderline, avoidant, antisocial) must be considered, as these are common comorbidities in perpetrators 5, 3
• Somatoform disorders differ in that symptom production is unconscious rather than deliberate 6, 2
• Malingering involves clear external incentives (financial gain, avoiding work), whereas FDIA perpetrators seek psychological gratification through the sick role 6, 2
• Shared psychotic disorder or folie à deux should be considered when both parties appear to genuinely believe in fabricated illnesses 6

Clinical Pitfalls to Avoid

Do not wait for patient insight or acknowledgment before considering the diagnosis:

• Lack of insight is a core feature of factitious disorders and does not invalidate the diagnosis 7
• Self-report psychiatric scales have minimal usefulness specifically due to patients' impaired insight 7
• Assessment should focus on who initiated consultations and whether disability is over- or under-emphasized, as these process observations provide diagnostic information independent of patient insight 7

Early identification is critical because:

• Healthcare providers can unknowingly perpetuate harm through treatments that satisfy the perpetrator's psychological needs at the proxy's expense 1
• Death is rare but possible, either from the fabricated disease itself, complications of examinations/treatments, or suicide 8
• Avoiding unnecessary prescriptions is essential to prevent iatrogenesis 8

Management Approach

The diagnostic process requires systematic exclusion:

1. First, exclude unusual presentations of genuine medical conditions 2
2. Second, exclude somatoform disorders and malingering 2
3. Gather information from multiple sources using varied techniques, as confirmation from multiple informants is necessary due to discrepancies in self-reporting 7

Therapeutic stance should be non-confrontational:

• Adopt a non-aggressive, empathetic attitude 8
• Use open, supportive discussion about the condition 9
• Implement conjoint clinical communication between primary care physician and psychiatrist 9
• Long-term psychotherapy and follow-up are recommended, though prognosis is often poor in the short and medium term 8, 9