ArticlePediatric health, medicine and therapeutics2026
Early Prediction Model for Etoposide-Based Protocols Resistance in Pediatric HLH.
Article in Pediatric health, medicine and therapeutics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Etoposide-based protocols remain the first-line therapy for pediatric hemophagocytic lymphohistiocytosis (HLH), yet 20-30% of patients exhibit primary resistance. Early identification of non-responders is critical to enable timely salvage therapy. We aimed to develop and validate a predictive model for etoposide-based protocols resistance using readily available clinical and laboratory parameters. Methods: A retrospective cohort of 79 pediatric HLH patients (median age 3.5 years; 53% male) treated with etoposide-based protocols (HLH-94/2004) at Hunan Children's Hospital (2020-2024) was analyzed. Patients were stratified into refractory (n=20) and responsive (n=59) groups based on 8-week treatment outcomes. Chemosensitive patients were defined as those achieving complete response (CR) or entering maintenance by week 8; chemorefractory patients were defined as those who died during induction, required salvage therapy due to progression, or failed to achieve CR within 8 weeks. CR required normalization of all quantifiable disease markers (sCD25, ferritin, triglycerides, ALT, hemoglobin, neutrophils, platelets). Pre-chemotherapy and early post-chemotherapy (Day 3) variables were compared using Results: Pre-chemotherapy IL-10 >131.2 μmol/L (OR=5.1; 95% CI 1.9-13.7; P=0.001) and pre-chemotherapy platelet count <55.5×10 Conclusion: Pre-chemotherapy IL-10 and platelet count reliably identify pediatric HLH patients at high risk of etoposide-based protocols resistance. Integration of Day 3 post-chemotherapy parameters enables ultra-early and more precise risk stratification, facilitating prompt transition to salvage therapies.
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