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Table 2 Results of immunologic studya of natural killer cells (NK cells) and sCD163 levels

From: Hemophagocytic lymphohistiocytosis with immunotherapy: brief review and case report

A. Natural Killer (NK) Cell Function
E:T Ratio Result Cytotoxicity Reference Range
50:1 5% Low (> = 20)
25:1 2% Low (> = 10)
12:1 2% Low (> = 5)
6:1 1%   (> = 1)
NK Lytic Units 0.1 Low (> = 2.6)
CD16/56% positive 4% Low (7–31)
Interpretation: Decreased NK cell function.
B. sCD163 Level 6384 ng/mL   (387–1785 ng/mL)
  1. aImmunologic study was conducted in Diagnostic Immunology Lab, Cincinnati Children’s Hospital