In addition, linkage disequilibrium analysis (LD) evidenced a linkage that did not occur by chance (LD >50) between PDCD1 SNPs and rs12979860 of IFNL4 in BD and in patients with CHC, MC and B‐NHL but not in patients with cirrhosis or HCC. The gene discussed is IFNL4; the disease is cryohydrocytosis.