Factitious disorder imposed on another (FDIA), formerly known as Munchausen syndrome by proxy (MSBP), represents one of the most egregious and dangerous forms of child maltreatment encountered in clinical practice. Although terminology has evolved, the core phenomenon described decades ago remains unchanged: A caregiver, most often the mother, intentionally fabricates, exaggerates, or induces illness in a child to meet psychological needs. The child suffers not only from the caregiver’s direct actions but also from unnecessary and often painful medical evaluations and procedures pursued by well-intentioned clinicians unaware of the deception. Once considered a rare psychiatric curiosity, FDIA is now recognized as a form of medical child abuse requiring early recognition and decisive intervention.
Foundational work traced the conceptual origins of the disorder to Asher’s description of Munchausen syndrome in adults and Meadow’s subsequent reports of caregivers who projected this behavior onto their children. These early descriptions remain historically important, and many of the observations made by these pioneers continue to apply today. However, contemporary literature has expanded the clinical understanding of FDIA. Rather than presenting only as dramatic hospital-based illness, fabricated or induced illness often develops gradually through subtle, chronic, or nonspecific symptoms that prompt repeated medical visits.
Modern case reports describe a wide range of deceptive behaviors, including manipulation of laboratory specimens, contamination of biologic samples, medication tampering, induction of respiratory symptoms, creation of skin lesions, and reporting of fictitious fevers. These presentations were sparsely documented in earlier literature but are now well recognized. The sheer variability of manifestations, combined with increasing caregiver sophistication, continues to complicate diagnosis.
A classical case illustrates how severe FDIA can become. A young child underwent extensive evaluation for gastrointestinal bleeding and anemia, including surgery and central line placement, without identification of an organic cause. The case was ultimately resolved when hospital staff discovered that the caregiver had been drawing blood from the child’s central line and contaminating his ostomy bag. Though extreme, this case remains representative of the most dangerous form of induced illness and demonstrates how quickly FDIA can escalate into life-threatening harm.
Both early and contemporary studies describe striking similarities among perpetrators. Most are biological mothers, many with experience or employment in health care or caregiving environments. They often present as attentive, cooperative, and deeply invested in their child’s care, forming close relationships with clinicians and nursing staff. This outward appearance can obscure significant psychological vulnerabilities, including trauma histories, maladaptive coping, personality pathology, and, in some cases, factitious symptoms imposed on themselves. Systematic reviews consistently confirm these patterns, including the predominance of female perpetrators and frequent medically related backgrounds.
The psychological dynamics underlying FDIA are complex but center on the caregiver’s emotional needs rather than the child’s welfare. Early descriptions emphasized pathological attachment and a need for validation through interactions with medical professionals. Contemporary perspectives incorporate broader frameworks of trauma, identity instability, and relational dysfunction. Many perpetrators appear to derive psychological reward from the role of devoted parent to a medically fragile child or from the attention and authority that accompany management of complex illness. While the behavior is typically deliberate, the motivation may not be fully conscious and is reinforced by clinician concern and family sympathy.
Recognition of FDIA remains challenging in both pediatric and general medical settings. Clinicians may struggle to reconcile caregiver concern with a lack of objective findings, often leading to prolonged diagnostic evaluations. Symptoms may occur only in the caregiver’s presence, fail to align with clinical data, or rapidly resolve when the child is separated from the suspected caregiver. These features have been consistently described across decades of literature and remain central to diagnosis.
Current diagnostic approaches rely on careful review of medical records across multiple providers and institutions, detailed documentation of inconsistencies, coordinated multidisciplinary communication, and observation of the child in controlled settings. In many cases, resolution of symptoms following separation from the caregiver provides the strongest evidence of fabricated or induced illness.
Contemporary management places FDIA squarely within the realm of child protection. Whereas early literature emphasized psychiatric understanding, current standards clearly define FDIA as active abuse with legal implications. Once identified, clinicians must prioritize child safety, which may include restricting caregiver access, involving child protective services, and notifying law enforcement when appropriate. Caregiver confrontation must be handled carefully, as denial and minimization are nearly universal. The primary goal is protection of the child, not eliciting an admission.
Long-term follow-up is often necessary, as affected children frequently experience lasting medical, psychological, and relational consequences. Factitious disorder imposed on another remains an uncommon but profoundly harmful form of abuse. Missed diagnoses can expose children to prolonged suffering and significant risk. Effective protection depends on clinician awareness, multidisciplinary coordination, and timely intervention grounded in both historical insight and contemporary evidence.
Timothy Lesaca is a psychiatrist in private practice at New Directions Mental Health in Pittsburgh, Pennsylvania, with more than forty years of experience treating children, adolescents, and adults across outpatient, inpatient, and community mental health settings. He has published in peer-reviewed and professional venues including the Patient Experience Journal, Psychiatric Times, the Allegheny County Medical Society Bulletin, and other clinical journals, with work addressing topics such as open-access scheduling, Landau-Kleffner syndrome, physician suicide, and the dynamics of contemporary medical practice. His recent writing examines issues of identity, ethical complexity, and patient–clinician relationships in modern health care. His professional profile appears on his ResearchGate profile, where additional publications and information are available.
