Hemophagocytic syndrome was highly considered based on the enduring fever, markedly elevated ferritin of 14,900 μg/L (reference interval: 12–300), and a low number of NK-cells, elevated IL-2 receptor of 1500 kU/L (223–710), and CD163 of 10.7 mg/L (0.69–3.86). Here, CD163 is linked to hemophagocytic syndrome.