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Familial hemophagocytic lymphohistiocytosis and viral infections

J I Henter1, A Ehrnst, J Andersson

  • 1Department of Pediatrics, Karolinska Institute, St Göran's/Karolinska Children's Hospital, Stockholm, Sweden.

Acta Paediatrica (Oslo, Norway : 1992)
|April 1, 1993
PubMed

Insights

Viral infections can trigger hemophagocytic lymphohistiocytosis (HLH) in genetically susceptible children. Distinguishing familial HLH from virus-associated HLH requires more than just identifying a viral infection.

Area of Science:

  • Pediatric Hematology
  • Infectious Diseases
  • Immunology

Background:

  • Hemophagocytic lymphohistiocytosis (HLH) is a rare, life-threatening hyperinflammatory syndrome.
  • Understanding the triggers and subtypes of HLH is crucial for effective management.

Observation:

  • A retrospective study analyzed 32 children with HLH, with 16 having affected siblings (familial HLH).
  • Infections were present in 22 children (13 familial), with Epstein-Barr virus, cytomegalovirus, and human parvovirus identified.
  • Two siblings with familial HLH onset within a month showed evidence of recent human parvovirus infection.

Findings:

  • Viral infections were common in both familial and potentially sporadic HLH cases.
  • The presence of a viral infection alone is insufficient to differentiate virus-associated HLH from familial HLH.

Implications:

  • Viral infections may act as a trigger for familial HLH in genetically predisposed individuals.
  • Further research is needed to elucidate the complex interplay between genetic factors and viral triggers in HLH pathogenesis.

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