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[Familial hemophagocytic lymphohistiocytosis]
J Stejskal1, O Hrodek, M Elleder
1Ustav patologické anatomie FDL UK Praha.
Insights
A rare, fatal infant disease causes fever, enlarged organs, and low blood counts. Early treatment may improve survival, but pathogenesis requires further study.
Area of Science:
- Pediatrics
- Hematology
- Immunology
Background:
- This study details a rare, fatal disease affecting infants and young children.
- The condition presents across multiple families, suggesting potential genetic links.
Observation:
- Affected children exhibit intermittent fever, significant hepatosplenomegaly, and progressive pancytopenia.
- Key laboratory findings include hyperbilirubinemia, hyperlipemia, and hypofibrinogenemia.
Findings:
- Autopsies reveal infectious complications and hemorrhagic diathesis, linked to severe immune defects.
- Bone marrow and organ biopsies show increased lymphocytes and histiocytes phagocytizing blood cells.
Implications:
- Understanding this disease is crucial for differential diagnosis in pediatric hematology and immunology.
- Further research into pathogenesis may reveal therapeutic targets for this severe pediatric condition.
Abstract:
This rare fatal disease of infants and early childhood occurred in seven children from four families. Six children died during 2-4 weeks from the beginning of disease, the last one has survived two years with cytostatic treatment. The disease was characterized by intermittent fever, hepatosplenomegaly and progressive pancytopenia as well as hyperbilirubinemia, hyperlipemia and hypofibrinogenemia. In addition to substantial enlargement of the liver and spleen prevailing autoptic findings were infectious complications due to severe immune defect or signs of hemorrhagic diathesis. Lymphocytes and histiocytes phagocytizing blood cells were increased in bone marrow, liver, spleen, often brain and further organs. Problems of differential diagnosis and pathogenesis were discussed.