Co-occurrence of the C9ORF72 expansion and a novel GRN mutation in a family with alternative expression of frontotemporal dementia and amyotrophic lateral sclerosis.

Abstract excerpt

The C9ORF72 repeat expansion is the major cause of frontotemporal lobar degeneration (FTLD), amyotrophic lateral sclerosis (ALS), and FTLD-ALS. In the reported pedigree, the 47-year old proband, presenting a four-year history of frontotemporal dementia, carried the C9ORF72 expansion plus a novel GRN p.Cys246X mutation. The father and a paternal uncle, harboring the C9ORF72 expansion only, had died by pure ALS...

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