Caregiver-fabricated or induced illness — branching viva

Opening

Examiner: A two-year-old boy is on your ward for the fourth time this year with apnoea. No one on the team has witnessed an episode. His mother, a former enrolled nurse, is the most engaged parent on the ward and is pressing for a central line. Between her reports he feeds, plays, and grows normally. How do you frame this? [1]

Candidate: I would frame this as suspected caregiver-fabricated or induced illness — a form of child abuse in which the child is, or is very likely to be, harmed because of a caregiver's behaviour — while still excluding any genuine cause of apnoea. The cardinal finding is the gap between symptoms vividly reported by the mother but never witnessed by staff, that resolve when she is absent, that do not fit any recognised disease, and that accompany an inexplicably willing push for invasive intervention. My priority is to involve the designated safeguarding lead immediately, document that gap precisely, and never confront the mother alone. [1] [2]

Branch 1 — definition and why the label changed

Examiner: You said "fabricated or induced illness" rather than "Munchausen syndrome by proxy." Why does the terminology matter? [2]

Candidate: Because the label changes the clinical question. "Munchausen syndrome by proxy" centred on the perpetrator's psychopathology and asked the clinician to diagnose a mental disorder in the parent — something I cannot do and do not need to do. "Fabricated or induced illness," and the AAP's "medical child abuse," centre on the child's welfare and ask only whether the caregiver's behaviour is causing harm. Glaser's 2020 reframing is the hinge: the diagnosis is about harm to the child, not the parent's motivation. I can act to make the child safe without ever proving the caregiver has factitious disorder, somatisation, or any psychiatric label. [2]

Examiner (probe): What are the three caregiver behaviours, and which is most dangerous? [1]

Candidate: Fabrication — inventing or exaggerating symptoms and giving false histories; falsification — contaminating specimens, tampering with lines and devices, altering charts; and induction — actively making the child ill by poisoning, suffocation, injecting substances, or withholding food or medication. Induction is the most dangerous subtype, carrying the highest mortality, as the Gray and Bentovim Great Ormond Street series of forty-one illness-induction children defined. [4]

Branch 2 — the mechanisms of harm

Examiner: You said the child is "very likely to be harmed." Through what mechanisms? [1]

Candidate: Three converging pathways. Direct harm flows from induction — in this child, if the apnoea is being produced, there is a real risk of hypoxic injury or death. Iatrogenic harm is the pathway that surprises candidates: the medical team, driven by the mother's narrative, becomes an unwitting agent of the abuse, because every unnecessary investigation, blood draw, anaesthetic, and the central line and gastrostomy she is requesting is itself a mechanism of harm. Psychological and developmental harm accumulates through the enforced sick role — lost play, socialisation, schooling, and a distorted identity. The treatment is to stop the iatrogenic harm by pausing non-essential investigation and to start the safeguarding response. [1] [2]

Branch 3 — perplexing presentation versus confirmed FII

Examiner: How do you distinguish this from a perplexing presentation, and what about a genuine rare disease? [7]

Candidate: A perplexing presentation is a puzzling set of symptoms where the cause is unknown and no harm is yet evident — 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. In this child, the repeated, never-witnessed apnoea resolving in the mother's absence, the cross-admission normality, and her push for invasive devices move this beyond perplexing presentation toward confirmed FII. A genuine rare disease — a metabolic, neurological, or cardiac cause of apnoea such as a channelopathy or a respiratory-chain disorder — must still be excluded with subspecialty input, because FII and genuine disease can coexist and labelling a genuinely ill child is devastating. I hold the uncertainty by completing the medical exclusion while the multi-agency record review and safeguarding plan proceed in parallel, and I defer the conclusion to the strategy meeting. [7] [1]

Examiner (probe): Name the alerting features you would document. [5]

Candidate: Symptoms reported by the caregiver but not observed by staff; symptoms that resolve when the caregiver is absent; a presentation that does not fit any recognised disease pattern; bizarre or incongruent features; an inexplicably poor response to standard treatment; objective findings that are consistently normal between reports; a caregiver unusually willing to consent to invasive investigations; and movement between hospitals or clinicians. I document each contemporaneously, factually, and without accusation — the gap itself is the clinical finding. [5]

Branch 4 — the safeguarding response

Examiner: Walk me through your management. [1]

Candidate: Step one, recognise and escalate to the designated safeguarding lead immediately — never investigate alone. Step two, pause and protect: halt non-essential investigation, treat only what is objectively demonstrated, and admit for separation and observation. Step three, gather information multi-agency: every hospital, GP, pharmacy, and school record, because the pattern emerges only when the fragmented records are brought together, and I never interview the suspected caregiver alone before the strategy meeting. Step four, convene a strategy meeting with social care, police, nursing, pharmacy, and mental health to decide perplexing presentation versus confirmed FII and to plan any separation, observation, or forensic testing. Step five, separation and observation to test symptom resolution. Step six, engage child protection and legal — an emergency-protection order or police protection if the child cannot be kept safe. Step seven, a named paediatrician owns a long-term plan of developmental monitoring, mental-health support, genuine-illness treatment, and scheduled re-evaluation. [1] [5]

Examiner (probe): What would you absolutely not do? [1]

Candidate: I would not confront or accuse the mother alone or at the bedside — premature confrontation may trigger escalation, flight, removal of the child, or destruction of evidence. I would not continue investigating the fabricated apnoea, because each test deepens the iatrogenic harm. I would not discharge the child to her unsupervised care. And I would not close the file after a single intervention, because recurrence and harm to siblings are well documented. [1]

Examiner (final corner): He has a six-month-old sister at home. What about her? [6]

Candidate: Siblings are at elevated risk and must be assessed as part of the initial response, not as an afterthought — the Yates and Bass systematic review of seven hundred and ninety-six cases documents harm to siblings. An infant sibling of a child with suspected induction is at immediate risk, so I would arrange a full history, examination, and review of her own health and attendance records through the child-protection team, and ensure she is safe while the assessment completes. [6]