As illustrated in Table 2, predominant distribution frequencies of CHI3L1 rs4950928, rs6691378, rs880633 and rs10399805 SNPs in PCa patients included homozygous C/C, G/G and G/G for rs4950928, rs6691378 and rs10399805 loci, respectively, and heterozygous T/C for the rs880633 locus. The gene discussed is CHI3L1; the disease is posterior cortical atrophy.