Abstract We report here utility of high serum ferritin alone as a predictor of mortality and diagnosis of hemophagocytic lymphohistiocytosis (HLH). We compared mortality in patients with high serum ferritin >5000 ng/mL versus 5000 ug/dL. Of 21 patients with high serum ferritin, a median of three criteria were fulfilled to diagnose HLH. All patients had features of immune‐activation, and 76.2% patients had features of immune‐pathology favoring diagnosis of HLH. Serum ferritin can aid in prediction of mortality and help in the early diagnosis of HLH.
