C9orf72 and mild neurocognitive disorder: Subsequently, three GWAS studies for MND [11-13], and one for FTLD [14] identified a susceptibility locus within this linked region, with strongest association coming from a 80 kb haplotype block containing 3 genes, MOBKL2B, IFNK and C9ORF72. It has now been shown that this at least some of this association is due to the presence of a large hexanucleotide (GGGGCC) in C9ORF72 gene in patients with both FTLD and MND [15,16].