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Fatal embolic events in childhood
1University of Adelaide, Discipline of Anatomy and Pathology, Level 3 Medical School North Building, Frome Road, Adelaide 5005, South Australia, Australia. roger.byard@sa.gov.au
Insights
Lethal embolic events in children, though rare, can obstruct vital circulations and are increasingly detected due to improved survival rates in pediatric patients. Forensic evaluation is becoming more critical for these uncommon but severe pediatric thromboembolism cases.
Area of Science:
- Pediatric Pathology
- Cardiovascular Medicine
- Neurology
Background:
- Lethal embolic events in children are infrequent but significant, often identified post-mortem.
- Emboli composition varies, including thrombi, tumors, infections, fat, air, and foreign materials.
- Major circulations affected are pulmonary, coronary, and cerebral.
Purpose of the Study:
- To review the causes and implications of lethal embolic events in pediatric populations.
- To highlight the increasing relevance of these events in clinical and forensic settings.
- To discuss specific pediatric conditions predisposing to embolism.
Main Methods:
- Review of literature on pediatric embolic events.
- Analysis of autopsy findings in children with embolic phenomena.
- Discussion of congenital and iatrogenic causes of pediatric thromboembolism.
Main Results:
- Rare conditions like arteriovenous malformations and paradoxical embolism pose risks, particularly to the brain.
- Right-to-left cardiac shunts and pulmonary vascular abnormalities contribute to paradoxical embolism.
- Iatrogenic causes, including central venous catheters and shunts, are important considerations.
Conclusions:
- Embolic events in children, while rare, carry lethal consequences and require careful consideration.
- Improved survival in children with chronic conditions increases the incidence of embolization.
- Forensic evaluation is crucial for understanding and managing pediatric thromboembolism.
Abstract:
Lethal embolic events in children are an uncommon occurrence that may be first detected at autopsy. Emboli consist of thrombi, tumours, infective organisms, fat, air and foreign body material. The most significant circulations that may be obstructed are the pulmonary, coronary and cerebral. Rare conditions such as arteriovenous malformations may act as sources for emboli in children, and the brain is at particular risk from paradoxical embolism. The latter is facilitated by right to left communications in the heart such as atrial and ventricular septal defects and also from pulmonary vascular abnormalities such as hereditary haemorrhagic telangiectasia (Osler-Weber-Rendu syndrome) and arteriovenous fistulas. Iatrogenic causes of thromboembolism must be considered in children with indwelling central venous catheters and ventriculoatrial shunts. Although rare, embolic events do occur in children with lethal consequences. As the incidence of embolization in clinical settings has been increasing, due to improved survival of children with predisposing chronic conditions, it is likely that more of these cases will be the subject of forensic evaluation.
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