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Published on: March 30, 2018
Pediatric Epstein-Barr virus-associated encephalitis: 10-year review
Asif Doja1, Ari Bitnun, Elizabeth Lee Ford Jones
1Division of Neurology, Department of Pediatrics, The Hospital for Sick Children and the University of Toronto, ON, Canada.
Insights
Epstein-Barr virus (EBV) can cause encephalitis in children, often without classic infectious mononucleosis symptoms. Early diagnosis using serology and PCR is crucial for recovery, though severe outcomes are possible.
Area of Science:
- Neurology
- Infectious Diseases
- Pediatrics
Background:
- Epstein-Barr virus (EBV) is known to cause various neurological conditions.
- Acute encephalitis in children requires prompt diagnosis and management.
Purpose of the Study:
- To summarize cases of Epstein-Barr virus-associated encephalitis in children from a 10-year prospective registry.
- To analyze clinical presentation, diagnostic methods, and outcomes of EBV encephalitis.
Main Methods:
- Review of a prospective registry of children with acute encephalitis (1994-2003).
- Identification of EBV-associated cases through serology and cerebrospinal fluid PCR.
- Analysis of clinical data, EEG, MRI, and follow-up outcomes.
Main Results:
- Twenty-one children (6%) had EBV encephalitis, with a median age of 13.
- Most presented with nonspecific symptoms like fever and headache, not classic infectious mononucleosis.
- Cerebrospinal fluid pleocytosis and abnormal MRI findings were common; 2 patients died, 2 had deficits.
Conclusions:
- EBV encephalitis in children often lacks typical infectious mononucleosis symptoms, complicating diagnosis.
- A combination of serologic and molecular tests is recommended for diagnosing EBV encephalitis.
- While most children recover fully, neurological sequelae and mortality can occur.
Abstract:
Many neurologic manifestations of Epstein-Barr virus (EBV) infection have been documented, including encephalitis, aseptic meningitis, transverse myelitis, and Guillain-Barré syndrome. These manifestations can occur alone or coincidentally with the clinical picture of infectious mononucleosis. Since 1994, The Hospital for Sick Children has maintained a prospective registry of all children admitted with acute encephalitis. This report summarizes all cases of Epstein-Barr virus-associated encephalitis compiled from 1994 to 2003. Twenty-one (6%) of 216 children, median age 13 years (range 3-17 years), in the Encephalitis Registry were identified as having evidence of Epstein-Barr virus infection. This evidence consisted of convincing Epstein-Barr virus serology and/or positive cerebrospinal fluid polymerase chain reaction (PCR). One patient had symptoms of classic infectious mononucleosis; all others had a nonspecific prodrome, including fever (n = 17; 81%) and headache (n = 14; 66%). Slightly less than half (n = 10; 48%) had seizures and often had electroencephalograms showing a slow background (n = 12; 57%). Many demonstrated cerebrospinal fluid pleocytosis (n = 17; 81%), and 71% (n = 15) had abnormal magnetic resonance imaging findings. Two patients died, 2 suffered mild deficits, and 16 were neurologically normal at follow-up. Most patients with Epstein-Barr virus encephalitis do not show typical symptoms of infectious mononucleosis. Establishing a diagnosis of Epstein-Barr virus encephalitis can be difficult, and, consequently, a combination of serologic and molecular techniques should be used when investigating a child with acute encephalitis. Most children make full recoveries, but residual neurologic sequelae and even death can and do occur.
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