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Abstract :
[en] Hemophagocytic lymphohistiocytosis (HLH) is a potentially lethal condition characterized by a pathologic inflammation. The diagnostic criteria for HLH are:fever, splenomegaly, cytopenias, hypertriglyceridemia, hypofibrinogenemia, abnormal natural killer cell (NK cell) functional assay, elevated soluble IL‐2Rα level, and elevated ferritin level (>500 µg/L). Institution of timely therapy in these critically ill patients may be delayed by difficulties establishing the diagnosis. We describe an adolescent boy diagnosed with Epstein Barr virus infection that developped a related HLH with a fatal issue, despite intensive medical treatment.