Additional studies identified further cases of FTD and ALS with mutations in TUBA4A, though they were exceptionally rare, whilst other papers failed to find any TUBA4A mutations in ALS or FTD cohorts (Dols-Icardo et al., 2016; Perrone et al., 2017; Li et al., 2018). Here, TUBA4A is linked to frontotemporal dementia.