Defibrotide for prophylaxis of sinusoidal obstruction syndrome/veno-occlusive disease (SOS/VOD) in pediatric high-risk patients: consensus guidelines from the European Society for Blood and Marrow Transplantation (EBMT)
Corbacioglu S, Bajwa R, Antmen AB, Balduzzi A, Boelens JJ, Bonifazi F, Cesaro S, Ciceri F, Colecchia A, Dignan F, Kleinschmidt K, Mahadeo KM, Pagliuca A, Sedlacek P, Shaw PJ, Stein J, Szmit Z, Tambaro F, Ince E, Verna M, Yesilipek A, Zecca M, Richardson PG, Mohty M, Kalwak K (2026) · Bone Marrow Transplantation · n=0
Perfil del estudio
- Diseño
- EBMT pediatric expert consensus guidelines synthesizing meta-analytic evidence (RR 0.30 for defibrotide prophylaxis) and two prospective trials (NCT00272948 pediatric prevention, NCT02851407 Harmony Trial)
- Tamaño de la muestra (n)
- —
- Intervención
- Defibrotide prophylaxis for pediatric hematopoietic stem cell transplant patients at high risk of sinusoidal obstruction syndrome/veno-occlusive disease
- Comparador
- No prophylaxis (EMA Direct Healthcare Professional Communication had advised against prophylactic use)
- Punto final primario
- Consensus weighted scoring system for SOS/VOD risk prediction and prophylaxis decision-making
- Resultado primario
- Meta-analysis combining retrospective and prospective studies found RR 0.30 for SOS/VOD with defibrotide prophylaxis; expert panel recommends prophylaxis is justified in pediatric high-risk patients despite conflicting Harmony Trial results and EMA DHPC advisory
- Duración del seguimiento
- 100-day post-HSCT (typical VOD onset window)
- PMID
- 41530538
Hallazgos clave
- RR 0.30 for SOS/VOD with defibrotide prophylaxis from combined meta-analysis
- EMA Direct Healthcare Professional Communication advised against prophylactic use
- Expert panel reaches contrary conclusion for pediatric high-risk patients
- Weighted scoring system developed for individualized decision-making
- Highlights regulatory-clinical evidence tension
Limitaciones
- Conflicting prospective trial results (NCT00272948 vs Harmony Trial)
- Harmony Trial methodologic limitations
- EMA DHPC advisory creates regulatory uncertainty
- Pediatric infant subgroup most affected by access decisions
- Not applicable to whole-leech hirudotherapy
Implicaciones clínicas
Corbacioglu 2026 illustrates how expert consensus can responsibly diverge from regulatory advisories when underlying evidence justifies. For ASH, this EBMT pediatric guideline exemplifies the structural complexity of the defibrotide pharmaceutical pathway operating under both regulatory tension and meta-analytic support. The K040187 device-leech US clinical practice operates without analogous prophylactic-indication regulatory uncertainty.
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