FUS and sarcoma: ALS pathogenic mutations identified in RNA-binding proteins (RBPs) include TAR DNA binding protein 43 (TDP-43), fused-in-sarcoma (FUS), Ewing sarcoma (EWS), TATA-binding protein-associated factor 15 (TAF15), and heterogeneous nuclear ribonucleoproteins (hnRNPs)5,6.