Univariate association testing of C9orf72 expansion carriers showed that they have significantly poorer ALS-Specific ECAS scores; this finding parallels other studies and supports a link between C9orf72 and MND-FTD (Motor Neuron Disease with Frontotemporal Dementia) spectrum disorders [36–39]. The gene discussed is C9orf72; the disease is frontotemporal dementia.