If we hypothesize that FTLD‐FUS with FUS mutations will not show Trn1 or any other FET family protein than FUS, a change of the nomenclature in the ALS‐FUS and FTLD‐FUS with no mutations of FUS should be considered, and the use of the terms ALS‐FET and FTLD‐FET might be more appropriate. The gene discussed is FUS; the disease is amyotrophic lateral sclerosis.