Abstract
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 with onset at 63 and 76 years, respectively. The case report and a review of the literature emphasize that phenotypical variations of the FTLD-ALS spectrum could be due to digenic inheritance.
Keywords:
Amyotrophic lateral sclerosis (ALS); C9ORF72; FTLD-ALS; GRN; frontotemporal lobar degeneration (FTLD).
Publication types
-
Case Reports
-
Research Support, Non-U.S. Gov't
MeSH terms
-
Amyotrophic Lateral Sclerosis / complications
-
Amyotrophic Lateral Sclerosis / diagnosis
-
Amyotrophic Lateral Sclerosis / genetics*
-
C9orf72 Protein
-
Family Health
-
Female
-
Fluorodeoxyglucose F18
-
Frontotemporal Dementia / complications
-
Frontotemporal Dementia / diagnosis
-
Frontotemporal Dementia / genetics*
-
Genetic Testing
-
Humans
-
Intercellular Signaling Peptides and Proteins / genetics*
-
Magnetic Resonance Imaging
-
Middle Aged
-
Mutation / genetics*
-
Positron-Emission Tomography
-
Progranulins
-
Proteins / genetics*
Substances
-
C9orf72 Protein
-
C9orf72 protein, human
-
GRN protein, human
-
Intercellular Signaling Peptides and Proteins
-
Progranulins
-
Proteins
-
Fluorodeoxyglucose F18