The majority of the remaining cases are TDP43‐negative cases and are associated with inclusions of fused‐in‐sarcoma protein (FUS), thus referred to as FTLD‐FUS, which is the cause of familial amyotrophic lateral sclerosis (ALS) type 6 (Mackenzie, Neumann, et al. 2010). This evidence concerns the gene FUS and familial amyotrophic lateral sclerosis.