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Sudden unexplained death in childhood
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Sudden unexplained death in childhood

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Sudden unexplained death in childhood
Specialty Pediatrics
Symptoms Usually none but may be preceded by a fever
Complications Death
Usual onset Sudden
Duration Unknown
Types Unknown
Causes Not definitive, most likely Heart arrhythmias, seizures, or a mix
Risk factors Family history of sudden death
Diagnostic method Unexplained death of a child of 1–18 years
Prevention None
Treatment None
Medication None
Prognosis Death
Frequency ~1.2 out of 100,000
Deaths ~1.2 out of 100,000

Sudden unexplained death in childhood (SUDC) is the death of a child over the age of 12 months which remains unexplained after a thorough investigation and autopsy. There has not been enough research to identify risk factors, common characteristics, or prevention strategies for SUDC.

SUDC is similar in concept to sudden infant death syndrome (SIDS). Like SIDS, SUDC is a diagnosis of exclusion, the concrete symptom of both being death. However, SIDS is a diagnosis specifically for infants under the age of 12 months while SUDC is a diagnosis for children 12 months and older. The causes of SIDS and SUDC are not definitively known but there are good chances heart arrhythmias and seizures are the main causes. Although it can happen to any child under the age of 18 (after which the deaths are classified as Sudden arrhythmic death syndrome (SADS), it is most common in those aged between 1–4 years.

Hypotheses

Researchers are exploring a possible connection between sudden unexplained death in toddlers, febrile seizures, and hippocampal anomalies. The occurrence of fever before the sudden deaths later in sleep, could explain the febrile seizure hypotheses

Epidemiology

SUDC is rare, with a reported incidence in the United States of 1.2 deaths per 100,000 children, compared to 54 deaths per 100,000 live births for SIDs. There are approximately 400 deaths per year of SUDC in the U.S,with over 200 of these cases being the children aged 1–4 years. SUDC deaths have occurred at the following sites:

  • Death at home, history provided: 79%
  • Crib or bassinet: 54%
  • Adult bed: 36%

The placed and found positions were as follows:

*applies only to youngest children

History

At the SIDS Alliance national convention in Atlanta, GA in 1999 Dr. Henry Krous gave a presentation titled "Post-Infancy SIDS: Is it on the rise?" This led to the beginning of the San Diego SUDC Research Project. The first definition of SUDC was published in 2005 in Pediatric and Developmental Pathology.


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