Interest in the cerebellum in FTD has arisen from the association of C9orf72 mutations with cerebellar pathology at post-mortem and a number of voxel-based morphometry MRI studies have now found involvement of the cerebellum in this group (Whitwell et al., 2012, Irwin et al., 2013, Mahoney et al., 2012, Rohrer et al., 2015). Here, C9orf72 is linked to frontotemporal dementia.