C9 and amyotrophic lateral sclerosis: Consistent with the low prevalence of RNA foci in glia, poly-GA inclusions were not detected in microglia or astrocytes of post-mortem C9-FTLD or C9-ALS brains (Mackenzie et al., 2013) or in astrocytes in the hippocampus of a C9-ALS patient (Ash et al., 2013).