This report reviews the clinical characteristics, diagnostic methods, and treatment options for pediatric secondary hemophagocytic lymphohistiocytosis (sHLH). The study highlights the predominance of Epstein-Barr virus as a trigger and the high mortality rate associated with multi-organ dysfunction syndrome.
Background
Pediatric secondary hemophagocytic lymphohistiocytosis is a severe inflammatory disorder that can lead to significant morbidity and mortality in children. Understanding its etiology, clinical presentation, and management is crucial for timely diagnosis and effective treatment. The condition is often misdiagnosed due to its nonspecific symptoms, emphasizing the need for heightened awareness among healthcare providers.
Data Highlights
Characteristic
Value
Median Age at Diagnosis
2.67 years
Infection-associated HLH
78.2%
EBV as Trigger
57.3%
Overall In-hospital Mortality
13.6%
MODS-related Fatalities
73.3%
Key Findings
Median age at diagnosis was 2.67 years, with 52.7% under 3 years old.
Infection-associated HLH accounted for 78.2% of cases, primarily triggered by EBV (57.3%).
Main clinical manifestations included fever (99.1%), lymphadenopathy (83.6%), and splenomegaly (77.3%).
Characteristic laboratory findings included pancytopenia, hyperferritinemia, and elevated soluble interleukin-2 receptor levels.
44.5% of patients received the HLH-94/04 chemotherapy protocol, achieving a remission rate of 91.9% among those with EBV infection.
Multi-organ dysfunction syndrome was responsible for 73.3% of fatalities.
Clinical Implications
Healthcare providers should maintain a high index of suspicion for sHLH in pediatric patients presenting with fever and systemic symptoms, particularly in the context of EBV infection. Early recognition and initiation of treatment, including the HLH-94/04 protocol, are critical to improving outcomes in affected children.
Conclusion
Pediatric sHLH is a complex and life-threatening condition that requires prompt diagnosis and tailored treatment strategies. Continued research and awareness are essential to enhance clinical management and patient outcomes.
