Any amyotrophic lateral sclerosis in which the cause of the disease is a mutation in the FIG4 gene. The disease is Monarch Disease Ontology identifier MONDO_0012945 (amyotrophic lateral sclerosis type 11). Also known as: ALS11, FIG4 amyotrophic lateral sclerosis, amyotrophic lateral sclerosis 11, amyotrophic lateral sclerosis caused by mutation in FIG4.