C9orf72 and primary progressive aphasia: Fig 4 shows the characteristics of written confrontation naming in different neurodegenerative disorders found in the Bulgarian dementia cohort–a nf-PPA case (correct writing), a patient with CBS (correct written naming with apraxic handwriting), a bvFTD case without C9orf72 expansion (correct writing), and an FTD-PSP case with C9orf72 expansion (correct writing with micrographia).