Caregiver-fabricated or induced illness — formative SAQs

SAQ 1 (10 marks)

A two-year-old boy is admitted for the fourth time in nine months with recurrent apnoea. No nurse or doctor on the ward has witnessed an episode. His mother, a former enrolled nurse, sleeps by his cot and is described by the team as "the most engaged parent on the ward." She is pressing for a central venous line and a gastrostomy to manage what she describes as life-threatening apnoea with feeds. Between her reports the child is observed to feed, play, and grow normally. His inter-episode saturations, examination, growth, and baseline investigations are all normal. [1] [5]

1. Define caregiver-fabricated or induced illness using the modern child-centred frame, and explain why the term "Munchausen syndrome by proxy" has been replaced. (3) [3]
2. List the RCPCH alerting features present in this vignette and outline your immediate assessment and safeguarding actions, including who you would involve and what you would NOT do. (4) [1] [5]
3. Describe the mechanism(s) by which this child is being harmed, naming the role of the medical team. (3) [1] [3]

Model answer — SAQ 1

(1) Definition and terminology (3). Caregiver-fabricated or induced illness (FII) is a form of child abuse in which a child is, or is very likely to be, harmed because of a caregiver's behaviour directed at making the child appear or actually be ill — through fabrication (false or exaggerated histories), falsification (tampering with specimens, devices, or records), or induction (actively making the child ill by poisoning, suffocation, or withholding treatment). "Munchausen syndrome by proxy" has been replaced because it centred on the perpetrator's psychopathology and required the clinician to diagnose a mental disorder in the parent, whereas the modern frame centres on the child's welfare and asks only whether the caregiver's behaviour is causing harm. Glaser's 2020 reframing — from "Munchausen by proxy" to child and family-oriented action — is the conceptual hinge: you do not need to prove the caregiver has any psychiatric label to make the child safe. [3]

(2) Alerting features, assessment, and safeguarding (4). Alerting features present: symptoms vividly reported by the mother but never witnessed by staff; symptoms that resolve in her absence (the child feeds, plays, and grows normally between reports); a presentation that does not fit any recognised disease pattern; inexplicably normal objective findings between reports; and a caregiver unusually willing to consent to invasive procedures (central line, gastrostomy) and with healthcare knowledge. Immediate actions: escalate to the designated safeguarding lead immediately and never investigate alone; document the gap between reported and witnessed signs contemporaneously, factually, and without accusation; obtain all records across every hospital, GP, pharmacy, and school to surface the cross-setting pattern; admit for observation and plan separation from the suspected caregiver to test symptom resolution; and assess siblings, who are at elevated risk. What I would NOT do: confront or accuse the mother alone or prematurely (risk of escalation, flight, or evidence destruction), continue investigating the fabricated apnoea with further invasive tests, discharge the child to her unsupervised care, or close the file after a single intervention. [1] [5]

(3) Mechanisms of harm (3). This child is harmed through at least two of the three converging pathways. Direct harm is threatened by the risk of induction if the apnoea is being produced, and by the invasive procedures themselves. Iatrogenic harm is the dominant mechanism here: the medical team, driven by the mother's false narrative, becomes an unwitting agent of the abuse by ordering unnecessary investigations, blood draws, anaesthetics, and the central line and gastrostomy she is requesting — every unnecessary intervention driven by the fabricated symptom is itself a mechanism of harm. The third pathway, psychological and developmental harm, accumulates through the enforced sick role with lost play, socialisation, and a distorted sense of self. The treatment is therefore to stop the iatrogenic harm — pause non-essential investigation, treat only what is objectively demonstrated — and start the safeguarding response. [1] [3]

SAQ 2 (10 marks)

A fourteen-month-old girl is brought to the emergency department with a seizure and a venous blood gas showing sodium 174 mmol/L. Her mother says she has had "nothing unusual." The child has been seen at two other hospitals this year for faltering growth and two episodes of unexplained drowsiness. On the ward her sodium normalises with fluid, but two days later, on a day her mother has been alone with her, it rises again to 168 mmol/L with no diarrhoea, vomiting, or fluid loss to explain it. The designated safeguarding lead has been informed. [4] [1]

1. State your immediate clinical and safeguarding priorities, including the forensic sampling you would arrange and how it must be handled. (4) [1] [4]
2. Distinguish confirmed FII from a perplexing presentation and from a genuine rare disease, and explain how you would hold the uncertainty. (3) [3] [1]
3. Describe the long-term plan after the child is made safe, including the protection of siblings. (3) [6] [1]

Model answer — SAQ 2

(1) Immediate priorities and forensic sampling (4). Treat the hypernatraemia as a medical emergency: fluid resuscitation and careful correction to avoid cerebral oedema, treat the seizure, and monitor neurology. Make the child safe — ensure the suspected caregiver does not have unsupervised access and do not discharge. Halt non-essential investigation driven by the caregiver's reports. Because induction by salt poisoning is suspected (unexplained, fluctuating hypernatraemia that recurs when the mother is alone), arrange targeted forensic specimens — paired serum and urine for sodium and osmolality, urine metabolic and toxicology screen, and drug levels — collected with a strict chain of custody, split samples, and documented handling, because the results may be needed for both clinical and legal purposes and a break in the chain can destroy the case. Involve the designated safeguarding lead, social care, and police; never confront the suspected caregiver alone; and convene a strategy meeting to coordinate separation and observation. [1] [4]

(2) Perplexing presentation versus confirmed FII versus genuine disease (3). A perplexing presentation is a puzzling set of symptoms where the cause is unknown and no harm is yet evident to the child — the response is to investigate and hold the uncertainty, not to diagnose FII prematurely. Confirmed FII requires evidence that caregiver behaviour has caused or is very likely to cause harm, triggering the child-protection response. Here the recurrence of life-threatening hypernatraemia only when the mother is present, with no physiological explanation, plus the cross-hospital pattern of faltering growth and unexplained drowsiness, shifts this from perplexing presentation toward confirmed FII with probable induction. A genuine rare disease — metabolic, endocrine, or renal causes of hypernatraemia such as diabetes insipidus — must still be excluded with subspecialty input, because FII and genuine disease can coexist and labelling a genuinely ill child as FII is devastating. I would hold the uncertainty by completing the medical exclusion, maintaining the multi-agency record review, and deferring the conclusion to the strategy meeting rather than acting alone. [3] [1]

(3) Long-term plan and sibling protection (3). Once the child is safe, a named paediatrician owns a long-term plan: treat any genuine illness on its merits, restore feeding and growth, provide developmental and mental-health support, and schedule re-evaluation — because recurrence and harm to siblings are well documented and a single intervention that closes the file fails the child. Siblings must be assessed as part of the initial response, not as an afterthought: an infant or young sibling of a child with suspected induction is at immediate risk and requires a full history, examination, and review of their own health and attendance records. Engage social care and police where criminal induction is suspected, and plan a safe disposition with ongoing multi-agency monitoring. Markers of response are the resolution of fabricated or induced symptoms with separation, cessation of unnecessary investigations, the child's return to normal growth and function, and the demonstrated safety of siblings. [6] [1]