Missense mutations in the TIA1 gene, responsible for Welander distal myopathy (WDM) [14] and amyotrophic lateral sclerosis (ALS), are characterized by delayed SG disassembly and accumulation of non-dynamic SGs that harbor cytotoxic TAR DNA-binding protein 43 (TARDBP, TDP43) [15]. The gene discussed is TIA1; the disease is distal myopathy, Welander type.