The spectrum of C9orf72 repeat lengths in Portuguese frontotemporal dementia and amyotrophic lateral sclerosis patients: from pathogenic expansions to intermediate alleles
Introduction Frontotemporal dementia and amyotrophic lateral sclerosis are clinically distinct disorders that share a common genetic etiology, with pathogenic hexanucleotide repeat expansions in the C9orf72 gene representing the most frequent genetic cause of both conditions. In this study we aim to determine the frequ...