The importance of C9orf72 is highlighted by its pathological context where expanded GGGGCC nucleotide repeats within the noncoding region of C9orf72 are one of the leading causes for amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) (DeJesus‐Hernandez et al, 2011; Renton et al, 2011). Here, C9orf72 is linked to frontotemporal dementia.