IFN-γ and IL-17 levels were lower in PNH positive vs. PNH negative AIHA (0.3 ± 0.2 vs. 1.33 ± 2.5; 0.15 ± 0.3 vs. 3,7 ± 9.1, respectively, p = 0.07 for both), whilst IL-6 and IL-10 were not significantly different in the two groups. This evidence concerns the gene IFNG and autoimmune hemolytic anemia.