Genotyping of KIR DNA in patients with NK-LDGL. DNA was amplified for KIR2DL1, KIR2DL2, KIR2DL3, KIR2DL4, KIR3DL1, and KIR3DL2 (inhibitory) or KIR2DS1, KIR2DS2, KIR2DS3, KIR2DS4, KIR2DS5, and KIR3DS1 (activating). The data are summarized for 8 patients with NK-LDGL. Group A haplotype indicates one activating receptor (KIR2DS4); group B haplotype, multiple activating KIR.