Adult onset type 2 familial hemophagocytic lymphohistiocytosis with PRF1 c.65delC/c.163C>T compound heterozygous mutations: A case report

Table 3 Expression of perforin and granzyme in the natural killer cells of our patient and his parents

	Patient	Father	Mother
Perforin positive rate of NK cells	80.44%	95.89%	94.61%
Granzyme positive rate of NK cells	90.49%	75.45%	84.07%

Biological reference range of perforin positive rate of natural killer (NK) cells: > 84%; Biological reference range of granzyme positive rate of NK cells: > 78%.