The Progranulin (GRN) Cys157LysfsX97 Mutation is Associated with Nonfluent Variant of Primary Progressive Aphasia Clinical Phenotype

The progranulin gene (GRN) g.10325_10331delCTGCTGT (relative to nt1 in NG_007886.1), alias Cys157LysfsX97, has been so far reported only once in a patient with frontotemporal dementia. Here, we describe a 63-year old patient carrying the same mutation, presenting with a 3-year history of language disorder, and diagnosed clinically with nonfluent variant of primary progressive aphasia according to current criteria. This patient's description expands the spectrum of clinical presentations of frontotemporal lobar degeneration caused by the GRN Cys157LysfsX97 mutation.