• Pediatr Hematol Oncol · Feb 2019

    Clinical Trial

    Secondary hemophagocytic lymphohistiocytosis in pediatric patients: a single center experience and factors that influenced patient prognosis.

    • Melahat Melek Oguz, Gurses Sahin, Altinel AcogluEsmaEhttp://orcid.org/0000-0003-0333-6979a Department of Pediatrics , Dr. Sami Ulus Maternity and Children's Health and Diseases Training and Research Hospital , Ankara , Turkey., Emine Polat, Husniye Yucel, Fatma Zehra Oztek Celebi, Hilal Unsal, Meltem Akcaboy, Eyup Sari, and Saliha Senel.
    • a Department of Pediatrics , Dr. Sami Ulus Maternity and Children's Health and Diseases Training and Research Hospital , Ankara , Turkey.
    • Pediatr Hematol Oncol. 2019 Feb 1; 36 (1): 1-16.

    AbstractHemophagocytic lymphohistiocytosis (HLH) is a life-threatening syndrome of excessive immune activation. Secondary HLH syndrome develops as a complication of infection, drugs, rheumatologic conditions, or malignancy. The main objectives of this work were to identify the etiology of secondary HLH and prognostic factors associated with mortality. Patients diagnosed with secondary HLH, between January 2011 and December 2016, were retrospectively included in this study. We analyzed clinical and laboratory findings as well as prognostic factors from 24 pediatric patients diagnosed with secondary HLH. The mean age of patients at the time of diagnosis was 79.9 ± 68.7 months (range: 2-202) and 54.2% of the patients were male. The most frequent HLH-2004 criterion was fever (100%). Underlying triggers of HLH were as follows: 13 (54.1%) infections, juvenile idiopathic arthritis in 5 patients (20.8%), drugs in 3 patients (12.5%), malignancies in 2 (0.8%), Kawasaki disease in 1 (0.4%) patient, and 1 (0.4%) with unknown triggers. The median time of diagnosis was 3 days (1-67 days). Overall, the mortality rate was 20.8%. In our logistic regression model, factors associated with mortality were decreased albumin levels (OR1 = 2.3[1.48-3.43]) and etoposide usage (OR2 = 1.22 [1.14-1.89]). The patient's 30-day survival was inferior among patients whose albumin level was 2 g/dL or less compared to those over 2 g/dL. Increased awareness of the underlying condition is critical in HLH patients. Our study emphasizes the prognostic significance of albumin level.

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